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SPORTS MEDICINE (77 journals)

Showing 1 - 79 of 79 Journals sorted alphabetically
American Journal of Sports Medicine     Hybrid Journal   (Followers: 153)
American Journal of Sports Science and Medicine     Open Access   (Followers: 38)
Archives of Sports Medicine and Physiotherapy     Open Access   (Followers: 2)
Arthroscopy, Sports Medicine, and Rehabilitation     Open Access   (Followers: 2)
Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology     Open Access   (Followers: 6)
Asian Journal of Sports Medicine     Open Access   (Followers: 11)
B&G Bewegungstherapie und Gesundheitssport     Hybrid Journal   (Followers: 2)
Baltic Journal of Sport and Health Sciences     Open Access   (Followers: 2)
Biomedical Human Kinetics     Open Access   (Followers: 8)
BMJ Open Sport & Exercise Medicine     Open Access   (Followers: 18)
British Journal of Sports Medicine     Hybrid Journal   (Followers: 78)
Case Studies in Sport and Exercise Psychology     Hybrid Journal   (Followers: 7)
Case Studies in Sport Management     Full-text available via subscription   (Followers: 7)
Ciencia y Deporte     Open Access   (Followers: 1)
Clinical Journal of Sport Medicine     Hybrid Journal   (Followers: 34)
Clinics in Sports Medicine     Full-text available via subscription   (Followers: 32)
Current Sports Medicine Reports     Full-text available via subscription   (Followers: 21)
European Journal of Sport Science     Hybrid Journal   (Followers: 65)
Exercise and Sport Sciences Reviews     Hybrid Journal   (Followers: 55)
German Journal of Exercise and Sport Research : Sportwissenschaft     Hybrid Journal   (Followers: 2)
International Journal of Athletic Therapy & Training     Hybrid Journal   (Followers: 15)
International Journal of Kinesiology and Sports Science     Open Access   (Followers: 16)
International Journal of Sport Nutrition & Exercise Metabolism     Hybrid Journal   (Followers: 83)
International Journal of Sports Medicine     Hybrid Journal   (Followers: 33)
International Journal of Sports Physiology and Performance     Hybrid Journal   (Followers: 22)
Journal of Aging and Physical Activity     Hybrid Journal   (Followers: 11)
Journal of Athletic Enhancement     Hybrid Journal   (Followers: 6)
Journal of Clinical Sport Psychology     Hybrid Journal   (Followers: 8)
Journal of Education, Health and Sport     Open Access   (Followers: 3)
Journal of Exercise & Organ Cross Talk     Open Access   (Followers: 4)
Journal of Functional Morphology and Kinesiology     Open Access  
Journal of Human Kinetics     Open Access   (Followers: 15)
Journal of ISAKOS     Hybrid Journal  
Journal of Physical Education Health and Sport     Open Access   (Followers: 1)
Journal of Reconstructive Microsurgery Open     Open Access  
Journal of Science and Medicine in Sport     Hybrid Journal   (Followers: 36)
Journal of Sport & Social Issues     Hybrid Journal   (Followers: 10)
Journal of Sport and Exercise Psychology     Hybrid Journal   (Followers: 22)
Journal of Sport Rehabilitation     Hybrid Journal   (Followers: 16)
Journal of Sports Medicine     Open Access   (Followers: 19)
Journal of Sports Science and Medicine     Open Access   (Followers: 22)
Journal of Sports Sciences     Hybrid Journal   (Followers: 34)
Journal of the International Society of Sports Nutrition     Open Access   (Followers: 55)
Knie Journal     Hybrid Journal  
Medicine & Science in Sports & Exercise     Hybrid Journal   (Followers: 59)
Motor Control     Hybrid Journal   (Followers: 7)
Movement & Sport Sciences : Science & Motricité     Full-text available via subscription   (Followers: 1)
OA Sports Medicine     Open Access   (Followers: 6)
Open Access Journal of Sports Medicine     Open Access   (Followers: 14)
Operative Techniques in Sports Medicine     Full-text available via subscription   (Followers: 1)
Physical Therapy in Sport     Hybrid Journal   (Followers: 41)
Physician and Sportsmedicine     Open Access   (Followers: 6)
Research in Sports Medicine: An International Journal     Hybrid Journal   (Followers: 11)
Revista Andaluza de Medicina del Deporte     Open Access   (Followers: 2)
Revista Brasileira de Cineantropometria & Desempenho Humano     Open Access   (Followers: 1)
Saudi Journal of Sports Medicine     Open Access   (Followers: 1)
Scandinavian Journal of Medicine & Science In Sports     Hybrid Journal   (Followers: 29)
Science & Sports     Hybrid Journal   (Followers: 9)
Science and Medicine in Football     Hybrid Journal   (Followers: 1)
Spor Bilimleri Dergisi / Hacettepe Journal of Sport Sciences     Open Access  
Spor ve Performans Araştırmaları Dergisi / Ondokuz Mayıs University Journal of Sports and Performance Researches     Open Access  
Sport Science and Health     Open Access   (Followers: 1)
Sport Sciences for Health     Hybrid Journal   (Followers: 5)
Sport, Education and Society     Hybrid Journal   (Followers: 12)
Sport, Ethics and Philosophy     Hybrid Journal   (Followers: 2)
Sport, Exercise, and Performance Psychology     Full-text available via subscription   (Followers: 11)
Sportphysio     Hybrid Journal  
Sports Health: A Multidisciplinary Approach     Hybrid Journal   (Followers: 4)
Sports Medicine     Full-text available via subscription   (Followers: 38)
Sports Medicine - Open     Open Access   (Followers: 12)
Sports Medicine and Arthroscopy Review     Full-text available via subscription   (Followers: 10)
Sports Medicine and Health Science     Open Access  
Sports Medicine International Open     Open Access   (Followers: 2)
Sports Medicine, Arthroscopy, Rehabilitation, Therapy & Technology     Open Access   (Followers: 16)
Sportverletzung · Sportschaden     Hybrid Journal   (Followers: 2)
Sri Lankan Journal of Sports and Exercise Medicine     Open Access  
Translational Sports Medicine     Hybrid Journal  
Video Journal of Sports Medicine     Open Access  
Zeitschrift für Sportpsychologie     Hybrid Journal  
Similar Journals
Journal Cover
Sport Sciences for Health
Journal Prestige (SJR): 0.311
Citation Impact (citeScore): 1
Number of Followers: 5  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1825-1234 - ISSN (Online) 1824-7490
Published by Springer-Verlag Homepage  [2469 journals]
  • The effect of exercise rehabilitation on COVID-19 outcomes: a systematic
           review of observational and intervention studies

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      Abstract: Purpose Disturbance to physical and psychological characteristics among COVID-19 survivors are not uncommon complications. In the current systematic review, we aimed to investigate the role of exercise rehabilitation programs, either in acute or post-acute phase, on COVID-19 patients’ outcomes. Methods A systematic search was conducted in November 2021 of Web of Sciences, PubMed-Medline, Google Scholar, and Scopus. Observational and intervention studies on COVID-19-infected patients undergoing a rehabilitation program including any type of exercise were included if they reported physical or psychological factors as outcomes. The Cochrane risk of bias tool for randomized controlled trials and Joanna Briggs Institute (JBI) critical appraisal checklist were used by two independent reviewers. Results A total number of 469, and 957 patients were included in 9 intervention studies, and 14 observational studies, respectively. Most factors reported by studies as outcomes fell in the categories of exercise capacity, respiratory function, as well as psychological aspects. The reported outcomes in almost all studies, disclosed the overall beneficial role of exercise rehabilitation in improving the outcomes. Conclusion The current review demonstrated that exercise rehabilitation generally could have a beneficial role in improvement of both physical and psychological related outcomes. As the best onset time, and FITT components are not yet completely clear, further large, well-designed RCTs are suggested to provide details of exercise rehabilitation program.
      PubDate: 2022-06-28
       
  • Effects of an intermittent exercise protocol on ankle control during a
           single-legged landing

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      Abstract: Purpose To identify the effects of fatigue from an exercise protocol (similar to a soccer match) on ankle motion and forces during single-legged drop landing. Methods Seventeen males aged (mean ± SD) 22.2 ± 2.0 years participated in this repeated measures study. A 90-min intermittent exercise protocol with a 15-min rest at halftime was performed. Before, at halftime and after the exercise, participants were tested via a single-legged drop landing task onto a force platform whilst wearing a three-dimensional inertial measurement system (Xsens). Ankle angles (plantarflexion/dorsiflexion and inversion/eversion) were analysed before landing and at peak ground reaction force after landing, and center of pressure was analysed at peak ground reaction force. Results No significant differences were found for the outcomes between pre-, halftime and post-exercise (p > 0.05). Conclusions Findings suggest that exercises simulating a soccer match (regarding exertion) do not necessarily lead to significant changes in ankle motion or forces around the ankle.
      PubDate: 2022-06-28
       
  • Sleep and mood of elite basketball referees during international
           competitions

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      Abstract: Purpose The current study aimed to characterise the sleep habits of elite basketball referees during international competitions. Methods Sixty-five elite basketball referees (international experience: 6 ± 3 years) provided actigraph-derived sleep data and daily mood scores during an international competition. Referees were also asked to provide reasons for nights of poor sleep. Results Referee’s actual sleep time was 6:23 ± 1:07 (h:mm), with 70% sleeping less than 7 h. Sleep onset and offset got later as the tournament progressed, but with minimal impact on actual sleep time. Sleep onset was later following evening games than on Rest Days (50 min, P = 0.05) and after Day Games (64 min, P < 0.001), while sleep offset was not different, resulting in shorter actual sleep times following Evening Games than Rest Days (− 36 min, P = 0.027) and Day Games (− 47 min, P < 0.001). Subjective mood status was not affected by tournament stage or game timing. The most common factors identified by referees as leading to poor sleep were ‘jet lag’ and Evening Games (both 16%). Conclusion These results highlight poor sleep habits of elite sporting officials during the most important international sporting events. Poor sleep was exacerbated in evening fixtures due to increased arousal and a curtailed opportunity for sleep rather than competitive anxiety as is often the case with athletes. Future studies should build upon our findings by investigating potential countermeasures to the issues we have identified.
      PubDate: 2022-06-28
       
  • Intra-day and inter-day reliabilities of the 0° and 45° adductor squeeze
           tests using hand-held dynamometry

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      Abstract: Purpose Determine the intra-day and inter-day reliabilities of the 0° and 45° short-lever adductor squeeze tests using hand-held dynamometry. Design Test–retest reliability Methods Seventeen (n = 17) academy basketball players (age range: 16–22 years) were recruited for this study. Participants performed three maximal voluntary isometric contractions (MVIC) in the short-lever position in 0° and 45° of hip flexion. Adductor force and torque values were assessed for intra- and inter-day reliabilities and ability to detect the smallest worthwhile change (SWC). Results Both test positions demonstrated excellent intra-day and inter-day reliabilities (ICC > 0.90, CV < 10%). Both test positions were capable of detecting the SWC using adductor force but not torque measures. The peak force, first trial and the average force of three trials demonstrated excellent test–retest reliability (ICC > 0.90, CV < 10%). There was no significant difference in strength score when the device was placed on either the dominant or non-dominant limb (p   ≥ 0.05). Conclusions Measuring adductor squeeze force in the 0° and 45° short-lever positions is reliable using hand-held dynamometry and both test positions are capable of detecting the SWC. The 0° test may illicit greater force values compared to the 45° test than previously reported. Using hand-held dynamometry, the device may be positioned against either the dominant or non-dominant limb.
      PubDate: 2022-06-27
       
  • Validity and reliability of the Persian translation of the children’s
           Ohio State University Scale of Intra-Gross Motor Assessment (OSU-SIGMA)

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      Abstract: Purpose The Ohio State University Scale of Intra-Gross Motor Assessment (OSU-SIGMA) is a criterion-referenced test for assessing fundamental movement skills (FMS) among children aged 2.5–14 years. The OSU-SIGMA was developed as performance-based curriculum tool. The purpose of this study was to translate the English version of the OSU-SIGMA into Persian and assess the psychometric properties. Methods Two Persian-English speakers translated the OSU-SIGMA instrument and manual from English to Persian. Six experts in children’s motor development independently assessed the content validity (relevance of meaning and appropriateness) of the translated version. Children aged 2.5–14 years (n = 220; 50% girls) were video recorded while performing each of the 11 the FMS. The same children participated in a two-week test–retest. Eleven trained assessors viewed the videos and their scores used to assess internal consistency, inter- and intrarater reliability, and test–retest reliability. Results The translated version was rated ‘exactly relevant’ >90% for four of the seven locomotor skills and > 80% for the remaining locomotor skills and all object control skills. Coefficients for content validity range from 0.53 (running) to 0.77 (skipping and striking), with little difference between boys and girls. Coefficients for intra- and interrater were ≥ 0.90 and for internal consistency ≥ 0.90 for all skills. The correlations for the two-week test–retest ranged from 0.74 (running) to 0.96 (stair climbing). Conclusions The Persian translation of the OSU-SIGMA was found to be reliable and valid for the assessment of FMS among Iranian children aged 2.5–13 years. The OSU-SIGMA was designed using a curriculum-based approach. The translation provides teachers in Persian countries with a pedological approach to develop age-appropriate FMS activities that can be used for programming, screening, and the prescription of children’s FMS.
      PubDate: 2022-06-25
       
  • Sex-related differences in muscular factors previously identified in the
           literature as potentially associated with hamstring strain injury in
           professional football players

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      Abstract: Purpose The purpose of this study was to assess if differences in hamstring strength, hamstring-to-quadriceps (H:Q) strength ratio, and biceps femoris long head (BFLH) fascicle length exist between male and female professional football (soccer) players. Methods One-hundred professional footballers participated in this cross-sectional study: 50 men and 50 women. Ultrasound images of BFLH muscle and isokinetic dynamometry tests were performed. Results Men were stronger than women for hamstring concentric (2.01 ± 0.21 Nm/kg vs. 1.55 ± 0.23 Nm/kg; p < 0.001; large effect size, 2.08) and eccentric (2.87 ± 0.45 Nm/kg vs. 2.39 ± 0.32 Nm/kg; p < 0.001; large effect size, 1.23) peak torques. There was no sex-related difference for H:Q conventional ratio (concentric/concentric; 0.55 ± 0.06 vs. 0.55 ± 0.07); but women presented greater H:Q functional ratio (eccentric/concentric; 0.78 ± 0.12 vs. 0.85 ± 0.09; p = 0.003; moderate effect size, 0.66). Men and women presented similar BFLH fascicle length: 0.24 ± 0.05 vs. 0.23 ± 0.05 (values normalized by muscle length). Conclusions Among the muscular factors assessed in this study, men presented stronger hamstring muscles, women presented greater H:Q functional ratio, and there was no sex-related differences for H:Q conventional ratio or BFLH fascicle length.
      PubDate: 2022-06-24
       
  • The efficacy of a tart cherry drink for the treatment of patellofemoral
           pain in recreationally active individuals: a placebo randomized control
           trial

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      Abstract: Purpose This study aimed to explore the efficacy of U.S. Montmorency tart cherry in treating recreationally active individuals with patellofemoral pain. Methods Twenty-four recreationally active participants with patellofemoral pain were randomly separated into either placebo (males N = 8, females N = 4, age = 43.30 ± 7.86 yrs, mass = 72.10 ± 17.89 kg, stature = 171.16 ± 10.17, BMI = 24.31 ± 3.75 kg/m2, symptom duration = 30.18 ± 10.90) or Montmorency tart cherry (males N = 9, females N = 3, age = 41.75 ± 7.52 yrs, mass = 76.96 ± 16.64 kg, stature = 173.05 ± 7.63, BMI = 25.53 ± 4.03 kg/m2, symptom duration = 29.73 ± 11.88) groups. Both groups ingested 60 mL of either Montmorency tart cherry concentrate or taste matched placebo daily for 6 weeks. Measures of self-reported pain (KOOS-PF), psychological wellbeing (COOP WONCA), and sleep quality (PSQI) alongside blood biomarkers (C-reactive protein, uric acid, TNF alpha, creatinine, and total antioxidant capacity) and knee biomechanics were quantified at baseline and 6 weeks. Differences between groups were examined using linear mixed-effects models. Results There was 1 withdrawal in the cherry and 0 in the placebo group and no adverse events were noted in either condition. The placebo condition exhibited significant improvements (baseline = 67.90 ± 16.18 & 6 weeks = 78.04 ± 14.83) in KOOS-PF scores compared to the tart cherry group (baseline = 67.28 ± 12.55& 6 weeks = 67.55 ± 20.61). No other statistically significant observations were observed. Conclusion Tart cherry supplementation as specifically ingested in the current investigation does not appear to be effective in mediating improvements in patellofemoral pain symptoms in recreationally active individuals.
      PubDate: 2022-06-23
       
  • Assessment of lower extremity functional performance in young male
           volleyball athletes

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      Abstract: Aim This study aimed to investigate lower limbs' functional performance in young male volleyball athletes. Methods Seventeen young male volleyball athletes, ages 15–17, performed weight bearing lunge test (WBLT) and the Y-balance test (YBT). Results There were no differences between the limbs in the analyses for WBLT and in all performance scores evaluated by YBT. However, the mean values of the YBT’s composite score were decreased compared to normative values and the correlations between WBLT and YBT presented weak values in almost all analyses. Conclusion Overall, functional symmetries between the limbs indicate low risk of lower limbs injury; results can be explained by the short period of practice. However, YBT’s composite score below the recommended values, suggests a neuromuscular training program. Finally, the weak correlations between WBLT and YBT indicate the necessity of performing both tests to have a more effective functional evaluation.
      PubDate: 2022-06-22
       
  • The interaction effect of green tea consumption and exercise training on
           fat oxidation, body composition and blood lipids in humans: a review of
           the literature

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      Abstract: Background Green tea (GT) consumption may influence fat oxidation (FO), body composition and blood lipid profile in human subjects. Therefore, this study aimed to review the current literature regarding the interactive effect of aerobic and resistance training with GT ingestion on these parameters. Methods Electronic searches were performed in Google Scholar, PubMed, Elsevier, Science Direct, and national databases. Only studies on human subjects that included GT intervention and aerobic or resistance exercise from any date to May 30, 2021 were reviewed. Results Twenty-seven papers (n = 831 participants) were included. From these, 12 studies addressed the acute or short-term effect of GT consumption on substrate oxidation during exercise, 2 studies assessed the long-term effect of GT consumption and aerobic exercise on substrate oxidation during exercise, 9 studies examined the short-term or long-term effects of GT intake and aerobic exercise on substrate oxidation or cardiometabolic risk factors, and 4 studies investigated the long-term effects of GT consumption and resistance training on substrate oxidation or cardiometabolic risk factors. Conclusions Short-term consumption of GT may have positive metabolic effects during moderate-intensity exercise in inactive people or those who exercise recreationally. Likewise, a combination of moderate-intensity aerobic training and GT consumption for a minimum period of 8 to 10 weeks can increase FO during exercise in healthy individuals. Regular resistance training combined with GT consumption may have potential benefits in enhancing body composition, lowering triglyceride, and increasing high-density lipoprotein in sedentary obese/overweight people.
      PubDate: 2022-06-21
       
  • Evening chronotype predicts dropout of physical exercise: a prospective
           analysis

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      Abstract: Purpose Eveningness preference to sleep/wake and perform physical/cognitive activities has been associated with worse health outcomes, when compared to morningness preference. Physical activity is one potential mediator that could explain this relationship; however, most of these evidences come from cross-sectional design studies. Our goal was to assess whether chronotype could predict the risk of dropout of physical exercise programs. Methods We followed 153 newly enrolled volunteers at three different gyms, from both sexes, aged between 18 and 65 years, during 12 weeks. The daily frequency of exercises in the programs was objectively measured (gym’s electronic turnstiles). Using questionnaires, we collected data of variables related to demographic characteristics, health, physical activity, sleep, anthropometric and chronobiological parameters (Morningness–Eveningness Questionnaire—MEQ). Two multivariate models were created using Cox regression analysis to test the risk of dropout of physical exercise practice. Both models accounted for age, educational level, civil status, membership plan duration, physical exercise practice frequency during week 1 and chronotype (MEQ score and chronotypes). Results Model 1 results showed that higher MEQ score was associated with a lower chance of quitting the program (HR = 0.98; CI95% 0.95–1.00; p = 0.046). Considering the chronotypes, E-types showed the highest dropout risk compared to that of M-types (HR = 2.22; CI95% 1.09–4.52; p = 0.027). Conclusion Our results suggest that chronotype is another variable to be considered in future studies on promoting PAs in formal environments. Likewise, the practice frequency during week 1 and duration of membership plan also deserve more attention in additional studies.
      PubDate: 2022-06-20
       
  • Effects of six weeks of plyometric training on the ground vs on a
           mini-trampoline on strength, jump performance, and balance in male
           basketball players—randomized clinical trial

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      Abstract: Purpose To compare the effects of a 6-week plyometric training protocol performed on the ground or a mini-trampoline on basketball players' strength, jumping, landing, and balance. Methods This randomized clinical trial recruited 30 male basketball athletes, (17–21 years), were divided into three groups: plyometric training on the mini-trampoline group (MT) (n = 11), plyometric training on the ground group (GR) (n = 9), and control group (CON) (n = 10). Isometric strength, countermovement jump height, landing impact (ground reaction force) in single-leg drop landing jump, and balance [center of pressure (COP) Area, COP length] in single-leg standing tests (eyes closed and open) were evaluated before and after intervention performing a MANOVA with repeated measures (pre- and post-training) for each dependent variable. Results No statistical effects were found for strength and jump height for any group or moment. In the single-leg drop landing, GR and CON showed lower landing impact than MT (p < 0.001). For the COP area with eyes open, GR showed better results after training (p = .013), and MT showed worse results (p < 0.001). Regarding COP area with eyes closed, all groups demonstrated improvements (p = 0.001). Regarding the COP length with eyes open, interactions showed differences between all groups, but not for moments pre- and post-training (p = 0.37). Improvements in COP length with eyes closed were observed post-training for all groups (p = 0.041). Conclusion To improve landing during jumps and balance performance, coaches should tend toward conventional plyometric training rather than on a mini-trampoline.
      PubDate: 2022-06-18
       
  • Contribution of the Craig’s test to hip internal rotation among
           baseball players

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      Abstract: Purpose Decreased hip internal rotation is a risk factor of shoulder and elbow injury among baseball players. However, few studies have investigated whether the Craig’s test is a predictor of hip internal rotation among baseball players. The purpose of this study was to identify whether the Craig’s test is a predictor of the range of hip internal rotation of high school baseball players, using multiple regression analysis. Methods We selected 23 high school baseball players as participants. Both hips of the participants were examined and divided into the lead hip and trail hip groups. The range of hip internal rotation at 90° of hip flexion (HIF) and 0° of hip extension (HIE) was evaluated. The femoral anteversion angle and α-angle were calculated using magnetic resonance imaging (MRI), and the Craig’s test was performed. Multiple regression analysis was used to examine the predictors of hip internal rotation by comparing the Craig’s test and the femoral anteversion angle and α-angle on MRI. Results On multiple regression analysis, the Craig’s test was a predictor of lead hip-HIF, trail hip-HIF, lead hip-HIE, and trail hip-HIE, and the respective R2 values were 0.62, 0.57, 0.66, and 0.52 (p < 0.05). Conclusion This study shows that the Craig’s test for high school baseball players is a predictor of HIF and HIE in the lead hip and trail hip. Since the Craig’s test results are the largest predictor of hip internal rotation, the soft tissues and Craig’s test need to be assessed among baseball players.
      PubDate: 2022-06-17
       
  • The influence of physical activity level on the length of stay in hospital
           in older men survivors of COVID-19

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      Abstract: Abstract The purpose of this study was to verify the influence of physical activity level on the length of hospital stay in older men recovered from COVID-19. In total, 126 older men diagnosed with COVID-19 were admitted to the hospital between September and December 2020. Among them, 70 survived, of which 39 older men were included in the study. Within 30 days after discharge, patients answered the International Physical Activity Questionnaire to measure their physical activity level through phone contact, with questions corresponding to the week before symptom onset. Clinical and laboratorial data from admission, days between onset of symptoms and admission, length of stay, computed tomography abnormalities, and the need for the intensive care unit were collected. The groups (active × sedentary) were compared using the Student t test or Mann–Whitney test for quantitative data and chi-square test was used for categorical data. There is no difference between the groups in characteristics of admission (p > 0.05), except by potassium level. Active older men had a shorter length of stay (6.50 ± 3.46 vs 11.48 ± 7.63 days; p = 0.03), disease duration (15.71 ± 4.84 vs 21.09 ± 7.69 days; p = 0.02), and lower frequency of lung damage when compared to their sedentary counterparts. In conclusion, being physically active prior to infection can attenuate length of hospital stay in older men with COVID-19.
      PubDate: 2022-06-11
       
  • Effects of the lockdown period on the mental health of elite athletes
           during the COVID-19 pandemic: a narrative review

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      Abstract: Purpose This review aimed to assess the effects of COVID-19 pandemic lockdown on mental health to elite athletes. The emotional background influenced their sport career and was examined by questionnaires. Methods We included original studies that investigated psychological outcomes in elite athletes during COVID-19 lockdown. Sixteen original studies (n = 4475 participants) were analyzed. Results The findings showed that COVID-19 has an impact on elite athletes’ mental health and was linked with stress, anxiety and psychological distress. The magnitude of the impact was associated with athletes’ mood state profile, personality and resilience capacity. Conclusion The lockdown period impacted also elite athletes’ mental health and training routines with augmented anxiety but with fewer consequences than the general population thanks to adequate emotion regulation and coping strategies.
      PubDate: 2022-06-08
       
  • Can hip muscle strengthening interventions improve lower extremity
           kinematics among healthy subjects' A systematic review of randomized
           controlled trials

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      Abstract: Purpose Poor lower extremity kinematics have been linked with lower extremity injuries. One of the main contributing factors in the development of poor lower extremity kinematics is hip muscle weaknesses. This systematic review aimed to summarize the literature related to the effects of hip muscle strengthening on lower extremity kinematics among healthy subjects. Methods A search for randomized controlled trials (RCTs) was conducted using the following databases: Cochrane, Web of Science, MEDLINE, PEDro and EBSCO. The selected studies had to distinguish the effects of hip muscle strengthening in healthy subjects, as compared to non-intervention or other kinds of intervention, and investigate at least one of the lower extremity kinematic factors. Two researchers performed study screening for obtaining the quality assessment scores in each included study using the PEDro scale. Statistical heterogeneity was tested using the Chi2 test and I2 statistic. Results Five studies were entered to review. There was level 1b or moderate evidence based on one “high” quality study that demonstrated hip muscle strengthening intervention was effective in the improvement of lower extremity kinematics. Conclusion It is difficult to make any definitive conclusions based on the results of this review and further research is needed. However, it should be considered that prescription hip muscle strengthening interventions alone maybe has a small effect on lower extremity kinematics in healthy subjects.
      PubDate: 2022-06-03
       
  • Association between domains of physical activity and health among
           teachers: a cross-sectional study

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      Abstract: Background The benefits of physical activity on health are well described in the general population. However, the association of physical activity in each domain and health among teachers is unknown. Purpose To analyze the association between the domains and types of physical activity (PA) and the health of teachers. Methods The sample consisted of 500 Brazilian elementary school teachers who completed a self-report questionnaire to estimate PA and dependent variables (overweight, perceived physical fitness, recurrent musculoskeletal symptoms, chronic disease, burnout, common mental disorders, and occupational stress). Poisson regression was conducted to estimate prevalence ratios (PR) in multiple analysis. Results The domains and types of PA associated with a lower prevalence ratio of the respective health-related disorders were: achievement of PA recommendation (low physical fitness, chronic disease, emotional exhaustion, low personal accomplishment, and common mental disorders, PR = 0.55–0.75); Leisure time PA (overweight, low physical fitness, musculoskeletal symptoms, PR = 0.59–0.75); Occupational PA and sports practice (overweight, low physical fitness, and common mental disorders, PR = 0.28–0.77); Strength exercises (overweight, low physical fitness, and chronic illness, PR = 0.62–0.63); Flexibility exercises (overweight, low physical fitness, and common mental disorders, PR = 0.67–0.70); and Domestic PA (chronic diseases, PR = 0.60). Occupational PA, active commuting, and sports practice were associated with a higher prevalence of depersonalization (PR = 1.56–1.76). Conclusion Heterogeneous results was found according to outcome. In general, PA across domains was associated with a better health profile in teachers, except for depersonalization, which was positively associated with PA.
      PubDate: 2022-06-01
       
  • Can fat-free mass gains induced by dry-land resistance training
           periodization affect negatively swimming performance'

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      Abstract: Purpose It is not clear whether fat-free mass gains impact negatively on swimming performance in swimmers. Moreover, less is known about the impact of different dry-land resistance training (DLRT) periodization models on body fat changes in swimmers. Hence, this study aimed to test whether block periodization DLRT (DLRT-BP) and daily undulating periodization DLRT (DLRT-DUP) are similar in improving fat-free mass, swimming and physical performance, muscular strength, and body fat in female and male amateur swimmers. Methods The participants were randomized into three groups: DLRT-BP [n = 10, three blocks of training with different intensities (changing each 4 week)], DLRT-DUP [n = 10, three sessions of training per week with different intensities (alternating each session)], and control group (n = 8, swimming training alone). Both intervention groups training three times a week. Muscle mass index (indicator of fat-free mass) and body fat percentage (iDXA), swimming (50-M swim velocity and time) and physical (squat jump) performance, muscular strength (1RM) were analyzed at baseline and after 12-weeks of DLRT. Results There were similar improvements in fat-free mass, swimming performance, and muscular strength from pre-intervention, and when compared to control group (P < 0.05). However, body fat percentage and squat jump did not change (P > 0.05). Fat-free mass changes explained 17% the improvement in 50-M swim velocity (r = 0.41, P = 0.040) in both training groups than control group. Conclusions Thus, although both DLRT periodization models induce fat-free mass gains (independent of sex), it does not seem to affect the responses in swimming performance and muscular strength in amateur swimmers.
      PubDate: 2022-06-01
       
  • Nano branched-chain amino acids enhance the effect of uphill (concentric)
           and downhill (eccentric) treadmill exercise on muscle gene expression of
           Akt and mTOR on aged rats

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      Abstract: Aim This study was aimed to consider the effects of uphill (concentric, CON) and downhill (eccentric, ECC) treadmill exercise with Nano-BCAA supplementation on muscle protein expression of Akt and mTOR. Methods Thirty aging male Wistar rats were randomly divided into 6 groups of (n = 5 each group): control (healthy), uphill running (CON, 0 to + 15°), downhill running (ECC, 0 to − 15°), Nano-BCAA (BCAA with Nano-Chitosan), CON + Nano-BCAA, and ECC + Nano-BCAA. The exercise training was performed in an interval form, with 3 sessions per weeks lasting 8 weeks. BCAA (in Nano form) administered by gavage 3 sessions per week for 8 weeks. RT-PCR was used to measure gene expression of Akt and mTOR. As well, protein expression of mTOR was performed by the IHC method. Results Administration of BCAA with CON and ECC increased the Akt gene expression (p < 0.05). Co-treatment of Nano-BCAA and exercises leads to much higher values of Akt than does single treatment. Compared to the healthy control group (without Nano-BCAA), co-treatment of CON + Nano-BCAA and ECC + Nano-BCAA showed a significant increase in the mTOR gene expression (p < 0.05). Conclusion The use of walking exercises, especially with a negative or positive slope, along with proper nutrition (taking healthy supplements such as BCAA) could be effective in strengthening muscle tissue, especially at the cellular level (increasing the Akt/mTOR activity). It can be an optimal alternative for those who cannot use resistance training at old age.
      PubDate: 2022-06-01
       
  • How physical activity, diet, and sedentary behavior cluster according to
           age in adolescents'

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      Abstract: Background Clusters’ behaviors can change with age, moving from adolescence to adulthood. Aims This study examined physical activity (PA), diet, and sedentary behavior (SB) clusters according to age groups (11–12, 13–15, 16–17, and 18–19 years) and its association with sex and maternal education. Methods Brazilian National School-based Health Survey (PeNSE 2015) (n = 16,522) data were analysed. Adolescents responded PA; consumption of fruits, vegetables; snacks, salt, and beverages (SSB); and SB. Two-step cluster analysis and Rao-Scott Chi square test were used. Results The Actives; the All-day sitters; the Inactive 1 (with moderate consumption of F&V); and the Inactive 2 (with small consumption of F&V and SSB) clusters were identified. The Actives and All-day sitters existed in all age groups. The Inactive 1 were the cluster more prevalent in 11–12 (33.9%), 13–15 (42.5%) and 16–17 (43.8%) age groups while, All-day sitters were most prevalent in 18–19 (43.7%) age group. Boys were more likely to be in the Actives; as against girls in All-day sitters, Inactive 1 and 2 clusters. The Actives had a higher proportion of adolescents with low maternal education. Conclusions SB increase in clusters over the increase of age group; else, adolescents in Actives groups decreased.
      PubDate: 2022-06-01
       
  • The effects of two different 8-week stretching protocols on postural
           stability in amateur sportsmen

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      Abstract: Purpose The purpose of this study was to compare the long-term effects of a static versus proprioceptive neuromuscular facilitation (PNF) stretching protocols by means of spinometry and baropodometry. We hypothesized that PNF may be more effective than static stretching in supporting the static and dynamic balance. Methods Thirty-six sport science students were divided into three groups: the first group attended a warm-up protocol on the treadmill only (warm-up group) while the other two carried out the same warm-up protocol followed by a static stretching (static group) or by a Contract Relax Antagonist Contract stretching (CRAC group). Stretching programs were performed three times per week on lower limb muscles and the postural stability of each participant was evaluated at entry (pre) and after 8 weeks of training (post). Results The ellipse area after a warm-up-only protocol did not change; after the static stretching protocol, it was significantly increased (from 111.3 ± 35.8 to 135.0 ± 32.3, p < 0.05), while after the CRAC protocol, it significantly decreased (from 119.1 ± 23.0 to 88.2 ± 19.8, p < 0.01). CRAC group had a significant reduction in average forces (− 3.9% from pre to post, p < 0.05) and in load response (− 0.6% from pre to post, p < 0.05). Pelvic inclination was reduced from 2.22 to 1.33 mm (p < 0.01) and pelvic torsion decreased by 0.94 ± 0.22° (p < 0.05) after the CRAC protocol. Conclusions Eight-week CRAC protocol was an excellent training for static and dynamic balance improvement and it was more effective than static stretching.
      PubDate: 2022-06-01
       
 
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