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SPORTS MEDICINE (78 journals)

Showing 1 - 78 of 78 Journals sorted alphabetically
American Journal of Sports Medicine     Hybrid Journal   (Followers: 193)
American Journal of Sports Science and Medicine     Open Access   (Followers: 36)
Apunts. Medicina de l'Esport     Full-text available via subscription   (Followers: 1)
Asia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology     Open Access   (Followers: 8)
Asian Journal of Sports Medicine     Open Access   (Followers: 11)
B&G Bewegungstherapie und Gesundheitssport     Hybrid Journal   (Followers: 2)
Biomedical Human Kinetics     Open Access   (Followers: 10)
BMJ Open Sport & Exercise Medicine     Open Access   (Followers: 16)
British Journal of Sports Medicine     Hybrid Journal   (Followers: 71)
Case Studies in Sport and Exercise Psychology     Hybrid Journal   (Followers: 5)
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: 30)
Current Sports Medicine Reports     Full-text available via subscription   (Followers: 21)
European Journal of Sport Science     Hybrid Journal   (Followers: 59)
Exercise and Sport Sciences Reviews     Hybrid Journal   (Followers: 53)
German Journal of Exercise and Sport Research : Sportwissenschaft     Hybrid Journal   (Followers: 4)
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: 78)
International Journal of Sports Medicine     Hybrid Journal   (Followers: 35)
International Journal of Sports Physiology and Performance     Hybrid Journal   (Followers: 20)
Journal of Aging and Physical Activity     Hybrid Journal   (Followers: 11)
Journal of Athletic Enhancement     Hybrid Journal   (Followers: 7)
Journal of Clinical Sport Psychology     Hybrid Journal   (Followers: 10)
Journal of Education, Health and Sport     Open Access   (Followers: 4)
Journal of Functional Morphology and Kinesiology     Open Access  
Journal of Human Kinetics     Open Access   (Followers: 16)
Journal of Imagery Research in Sport and Physical Activity     Hybrid Journal   (Followers: 8)
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     Full-text available via subscription   (Followers: 31)
Journal of Sport & Social Issues     Hybrid Journal   (Followers: 12)
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: 37)
Journal of the International Society of Sports Nutrition     Open Access   (Followers: 58)
Medicine & Science in Sports & Exercise     Hybrid Journal   (Followers: 61)
Motor Control     Hybrid Journal   (Followers: 7)
OA Sports Medicine     Open Access   (Followers: 6)
Open Access Journal of Sports Medicine     Open Access   (Followers: 16)
Operative Techniques in Sports Medicine     Full-text available via subscription   (Followers: 1)
Physical Therapy in Sport     Hybrid Journal   (Followers: 42)
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)
Revista Brasileira de Medicina do Esporte     Open Access  
Revista del Pie y Tobillo     Open Access  
Saudi Journal of Sports Medicine     Open Access   (Followers: 2)
Scandinavian Journal of Medicine & Science In Sports     Hybrid Journal   (Followers: 28)
Science & Motricité     Full-text available via subscription   (Followers: 1)
Science & Sports     Full-text available via subscription   (Followers: 10)
Science and Medicine in Football     Hybrid Journal  
South African Journal of Sports Medicine     Open Access   (Followers: 8)
Spor Bilimleri Dergisi / Hacettepe Journal of Sport Sciences     Open Access  
Spor Hekimliği Dergisi / Turkish Journal of Sports Medicine     Open Access  
Spor ve Performans Araştırmaları Dergisi / Ondokuz Mayıs University Journal of Sports and Performance Researches     Open Access  
Sport Sciences for Health     Hybrid Journal   (Followers: 5)
Sport, Education and Society     Hybrid Journal   (Followers: 11)
Sport, Ethics and Philosophy     Hybrid Journal   (Followers: 3)
Sport, Exercise, and Performance Psychology     Full-text available via subscription   (Followers: 13)
Sport- und Präventivmedizin     Hybrid Journal   (Followers: 3)
Sportphysio     Hybrid Journal  
Sports Health: A Multidisciplinary Approach     Hybrid Journal   (Followers: 4)
Sports Medicine     Full-text available via subscription   (Followers: 34)
Sports Medicine - Open     Open Access   (Followers: 13)
Sports Medicine and Arthroscopy Review     Full-text available via subscription   (Followers: 9)
Sports Medicine International Open     Open Access   (Followers: 2)
Sports Medicine, Arthroscopy, Rehabilitation, Therapy & Technology     Open Access   (Followers: 17)
Sportverletzung · Sportschaden     Hybrid Journal   (Followers: 2)
Sri Lankan Journal of Sports and Exercise Medicine     Open Access  
Translational Sports Medicine     Hybrid Journal  
Zeitschrift für Sportpsychologie     Hybrid Journal   (Followers: 2)
Similar Journals
Journal Cover
International Journal of Sports Medicine
Journal Prestige (SJR): 1.217
Citation Impact (citeScore): 2
Number of Followers: 35  
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0172-4622 - ISSN (Online) 1439-3964
Published by Thieme Publishing Group Homepage  [239 journals]
  • Cardiac Autonomic and Physiological Responses to Moderate-Intensity
           Exercise in Hypoxia
    • Authors: Fornasiero; Alessandro, Skafidas, Spyros, Stella, Federico, Zignoli, Andrea, Savoldelli, Aldo, Rakobowchuk, Mark, Pellegrini, Barbara, Schena, Federico, Mourot, Laurent
      Abstract: Exercise physiological responses can be markedly affected by acute hypoxia. We investigated cardiac autonomic and physiological responses to different hypoxic training protocols. Thirteen men performed three exercise sessions (5×5-min; 1-min passive recovery): normoxic exercise at 80% of the power output (PO) at the first ventilatory threshold (N), hypoxic exercise (FiO2=14.2%) with the same PO as N (HPO) and hypoxic exercise at the same heart rate (HR) as N (HHR). PO was lower in HHR (21.1±9.3%) compared to N and HPO. Mean HR was higher in HPO (154±11 bpm, p0.05) but reduced in HPO (p0.05) and increased in HPO (p0.05) and increased in HPO (p
      Citation: Int J Sports Med ; : -
      PubDate: 2019-10-24T00:00:00+01:00
      DOI: 10.1055/a-1015-0647
  • Moderate-intensity Exercise Training in Sole and Simultaneous Forms with
           Insulin Ameliorates the Experimental Type 1 Diabetes-induced Intrinsic
           Apoptosis in Testicular Tissue
    • Authors: Samadian; Zahra, Azar, Javad Tolouei, Moshari, Sana, Razi, Mazdak, Tofighi, Asghar
      Abstract: The aim of this study was to investigate the ameliorative effect of moderate-intensity exercise training in sole and simultaneous forms with insulin on experimental type 1 diabetes (T1D)-induced apoptosis. A total of 36 mature male Wistar rats were divided into six equally sized groups, including sedentary control (Con), moderate-intensity exercise training (E-sole), sedentary T1D-induced (D-sole), moderate-exercise-trained T1D-induced (DE), insulin-treated sedentary T1D-induced (DI) and exercise-trained, and insulin-treated T1D-induced (DEI) groups. The 6-week exercise training intervention was involved 30 min of moderate-intensity running on a treadmill once daily (5 days/week). Next, tubular differentiation (TDI) and spermiogenesis (SPI) indices were assessed. The Bcl-2, Bax and caspase-3 expressions were determined using RT-PCR, immunohistochemistry and western blot techniques. Finally, the TUNEL staining was used to analyze the apoptosis ratio. The moderate-intensity exercise training in the sole and when simultaneously considered with insulin (DEI) maintained testicular cellularity, up-regulated Bcl-2 expression, reduced Bax expression and ameliorated the diabetes-induced apoptosis. We failed to show remarkable alterations in caspase-3 mRNA and protein levels in the DE group versus D-sole animals. In conclusion, the moderate-intensity exercise training is able to potentially protect testicular cells from T1D-induced intrinsic apoptosis via up-regulating Bcl-2 and downregulating Bax expressions. Moreover, it amplifies the insulin-induced anti-apoptotic impacts.
      Citation: Int J Sports Med ; : -
      PubDate: 2019-10-22T00:00:00+01:00
      DOI: 10.1055/a-0985-4332
  • MiR-214 Attenuates the Osteogenic Effects of Mechanical Loading on
    • Authors: Yuan; Yu, Guo, Jianmin, Zhang, Lingli, Tong, Xiaoyang, Zhang, Shihua, Zhou, Xuchang, Zhang, Miao, Chen, Xi, Lei, Le, Li, Hui, Liu, Timon Cheng Yi, Xu, Jiake, Zou, Jun
      Abstract: Exercise is an effective way to prevent osteoporosis, but its mechanism remains unclear. MicroRNAs (miRNAs) play an essential role in bone metabolism. Recently, mechanical loading was reported to induce changes in miRNA expression in osteoblasts. However, the role of miRNAs in bone under exercise and its underlining mechanisms of action still remain unknown. MiR-214 was reported to regulate the process of osteogenesis and is considered a biomarker of osteoporosis. In this study, we aimed to investigate whether exercise could induce changes in miRNA expression in bone and to study the effects of miR-214 on mechanical loading-induced osteogenesis in osteoblasts. The results showed that miR-214 was down-regulated in both tibia from C57BL/6 mice after exercise in vivo and in osteoblasts after mechanical strain in vitro. Mechanical strain could enhance the ALP activity, promote matrix mineralization, up-regulate the expression of osteogenic factors such as ATF4, Osterix, ALP and β-catenin, and down-regulate RANKL and RANK expression. Over-expression of miR-214 not only inhibited the expression of these osteogenic factors but also attenuated mechanical strain-enhanced osteogenesis in osteoblasts. Collectively, our results indicated that miR-214 could attenuate the osteogenic effects of mechanical loading on osteoblasts, suggesting that inhibition of miR-214 may be one of the ways in which exercise prevents osteoporosis.
      Citation: Int J Sports Med ; : -
      PubDate: 2019-10-22T00:00:00+01:00
      DOI: 10.1055/a-1015-0285
  • Fate Tracing of Isl1+Cells in Adult Mouse Hearts under Physiological and
           Exercise Conditions
    • Authors: Zhou; Yunhe, Yang, Hua, Shi, Jiahao, Zhang, Mengjie, Yang, Sai, Wang, Ning, Sun, Ruilin, Wang, Zhugang, Fei, Jian
      Abstract: Myocardial damage due to dysfunctional myocardium has been increasing, and the prognosis of pharmacological and device-based therapies remain poor. Isl1-expressing cells were thought to be progenitor cells for cardiomyocyte proliferation after specific stimuli. However, the true origin of the proliferating myocardiac cells and the role of Isl1 in adult mammals remain unresolved. In this study, Isl1-CreERT2 knock-in mouse model was constructed using CRISPR/Cas9 technology. Using tamoxifen-inducible Isl1-CreERT/Rosa26R-LacZ system, Isl1+cells and their progeny were permanently marked by lacZ-expression. X-gal staining, immunostaining, and quantitative PCR were then used to reveal the fate of Isl1+cells under physiological and exercise conditions in mouse hearts from embryonic stage to adulthood. Isl1+cells were found to localize to the sinoatrial node, atrioventricular node, cardiac ganglia, aortic arch, and pulmonary roots in adult mice heart. However, they did not act as cardiac progenitor cells under physiological and exercise conditions. Although Isl1+cells showed progenitor cell properties in early mouse embryos (E7.5), this ability was lost by E9.5. Furthermore, although the proliferation and regeneration of heart cell was observed in response to exercise, the cells associated were not Isl1 positive.
      Citation: Int J Sports Med ; : -
      PubDate: 2019-10-15T00:00:00+01:00
      DOI: 10.1055/a-0961-1458
  • Clinical Features and isokinetic Parameters in Assessing Injury Risk in
           elite Football Players
    • Authors: Liporaci; Rogério F., Saad, Marcelo, Grossi, Debora Bevilaqua, Riberto, Marcelo
      Abstract: Football players frequently face the occurrence of non-contact injuries. Although there are likely multiple factors that contribute to increased risk of non-contact injury, it remains a challenge to correlate all these factors. However, it is not clear how much of individual training abilities may interfere in these events. As such, the primary aim of the present study was to determine whether the reduction of functional performance of the thigh in the isokinetic knee tests, anthropometric and morbid history can establish risk factors for lower-limb musculoskeletal injuries throughout the season. The incidence of injuries and odds ratios were calculated for suspected risk factors. Hamstring/Quadriceps conventional ratio outside of the safety range (55–64%) may be involved in the occurrence of non-contact muscle injuries and the risk for any musculoskeletal injuries in the lower extremities is 16 times higher when extensor peak of torque exceeds 10% and 12 times higher when flexor peak of torque difference was greater than 10%. This kind of evaluation can result in intervention programs that may decrease the risk of lower-limb musculoskeletal injuries. Based on these results we can establish a specific and individualized exercise program for each athlete and thus protect them during the season.
      Citation: Int J Sports Med ; : -
      PubDate: 2019-10-15T00:00:00+01:00
      DOI: 10.1055/a-1014-2911
  • Isovelocity vs. Isoinertial Sprint Cycling Tests for Power- and
           Torque-cadence Relationships
    • Authors: Kordi; Mehdi, Folland, Jonathan, Goodall, Stuart, Barratt, Paul, Howatson, Glyn
      Abstract: Sprint cycling performance is heavily dependent on mechanical peak power output (PPO) and the underlying power- and torque-cadence relationships. Other key indices of these relationships include maximum torque (TMAX), cadence (CMAX) and optimal cadence (COPT). Two common methods are used in the laboratory to ascertain PPO: isovelocity and isoinertial. Little research has been carried out to compare the magnitude and reliability of these performance measures with these two common sprint cycling assessments. The aim of this study was to compare the magnitude and reliability of PPO, TMAX, CMAX and COPT measured with isovelocity and isoinertial sprint cycling methods. Two experimental sessions required 20 trained cyclists to perform isoinertial sprints and then isovelocity sprints. For each method, power-cadence and torque-cadence relationships were established, and PPO and COPT were interpolated and TMAX and CMAX were extrapolated. The isoinertial method produced significantly higher PPO (p
      Citation: Int J Sports Med ; : -
      PubDate: 2019-10-07T00:00:00+01:00
      DOI: 10.1055/a-0989-2387
  • Hydrogen Rich Water Improved Ventilatory, Perceptual and Lactate Responses
           to Exercise
    • Authors: Botek; Michal, Krejčí, Jakub, McKune, Andrew J., Sládečková, Barbora, Naumovski, Nenad
      Abstract: The potential anti-fatigue and performance benefits of hydrogen rich water (HRW) have resulted in increased research interest over the past 5 years. The aim of this study was to assess physiological and perceptual responses to an incremental exercise protocol after administration of 600 ml HRW within 30 min before exercise. This randomized, double blinded placebo-controlled cross over study included twelve healthy males aged 27.1±4.9 years. The exercise protocol consisted of a 10 min warm-up at 1.0−1, followed by 8 min at 2.0, 3.0, and 4.0−1, respectively. Cardio-respiratory variables, lactate and ratings of perceived exertion (RPE) were assessed in the last minute of each step. A significantly lower blood lactate was found with HRW (4.0±1.6 and 8.9±2.2 mmol.l−1) compared to Placebo (5.1±1.9 and 10.6±3.0 mmol.l−1) at 3.0, and 4.0−1, respectively. Ventilatory equivalent for oxygen and RPE exhibited significantly lower values with HRW (32.3±7.2, and 17.8±1.2 points, respectively) compared to Placebo (35.0±8.4, and 18.5±0.8 points, respectively) at 4−1. To conclude, acute pre-exercise supplementation with HRW reduced blood lactate at higher exercise intensities, improved exercise-induced perception of effort, and ventilatory efficiency.
      Citation: Int J Sports Med ; : -
      PubDate: 2019-10-01T00:00:00+01:00
      DOI: 10.1055/a-0991-0268
  • Radiographic Osteoarthritis Prevalence Over Ten Years After Anterior
           Cruciate Ligament Reconstruction
    • Int J Sports Med
      DOI: 10.1055/a-1008-8488

      © Georg Thieme Verlag KG Stuttgart · New York

      Artikel in Thieme eJournals:
      Inhaltsverzeichnis     Volltext

      Int J Sports Med ; : -2019-09-18T00:00:00+01:00
  • Increased Risk of Musculoskeletal Disorders and Mental Health Problems in
           Retired Professional Jockeys: A Cross-Sectional Study
    • Int J Sports Med
      DOI: 10.1055/a-1004-5495

      © Georg Thieme Verlag KG Stuttgart · New York

      Artikel in Thieme eJournals:
      Inhaltsverzeichnis     open access Volltext

      Int J Sports Med ; : -2019-09-03T00:00:00+01:00
  • Echocardiographic Assessment of Left Ventricular Remodeling in American
           Style Footballers
    • Authors: Moneghetti; Kegan James, Singh, Tamanna, Hedman, Kristofer, Christle, Jeffrey W., Kooreman, Zoe, Kobayashi, Yukari, Bouajila, Sara, Amsallem, Myriam, Wheeler, Matthew, Gerche, Andre La, Ashley, Euan, Haddad, Francois
      Abstract: Several athletic programs incorporate echocardiography during pre-participation screening of American Style Football (ASF) players with great variability in reported echocardiographic values. Pre-participation screening was performed in National Collegiate Athletic Association Division I ASF players from 2008 to 2016 at the Division of Sports Cardiology. The echocardiographic protocol focused on left ventricular (LV) mass, mass-to-volume ratio, sphericity, ejection fraction, and longitudinal Lagrangian strain. LV mass was calculated using the area-length method in end-diastole and end-systole. A total of two hundred and thirty players were included (18±1 years, 57% were Caucasian, body mass index 29±4 kg/m2) after four players (2%) were excluded for pathological findings. Although there was no difference in indexed LV mass by race (Caucasian 78±11 vs. African American 81±10 g/m2, p=0.089) or sphericity (Caucasian 1.81±0.13 vs. African American 1.78±0.14, p=0.130), the mass-to-volume ratio was higher in African Americans (0.91±0.09 vs. 0.83±0.08, p
      Citation: Int J Sports Med ; : -
      PubDate: 2019-12-02T00:00:00+0100
      DOI: 10.1055/a-1014-2994
      Issue No: Vol. eFirst
  • Cardiorespiratory Changes During Prolonged Downhill Versus Uphill
           Treadmill Exercise
    • Authors: Garnier; Yoann, Lepers, Romuald, Assadi, Hervé, Paizis, Christos
      Abstract: Oxygen uptake (V̇O2), heart rate (HR), energy cost (EC) and oxygen pulse are lower during downhill compared to level or uphill locomotion. However, a change in oxygen pulse and EC during prolonged grade exercise is not well documented. This study investigated changes in cardiorespiratory responses and EC during 45-min grade exercises. Nine male healthy volunteers randomly ran at 75% HR reserve during 45-min exercise in a level (+1%), uphill (+15%) or downhill (−15%) condition. V̇O2, minute ventilation (V̇E) and end-tidal carbon dioxide (PetCO2) were recorded continuously with 5-min averaging between the 10th and 15th min (T1) and 40th and 45th min (T2). For a similar HR (157±3 bpm), V̇O2, V̇E, and PetCO2 were lower during downhill compared to level and uphill conditions (p
      Citation: Int J Sports Med ; : -
      PubDate: 2019-12-02T00:00:00+0100
      DOI: 10.1055/a-1015-0333
      Issue No: Vol. eFirst
  • Injury Incidence and Workloads during congested Schedules in Football
    • Authors: Howle; Kieran, Waterson, Adam, Duffield, Rob
      Abstract: This study compared injury incidence and training loads between single and multi-match weeks, and seasons with and without congested scheduling. Measures of internal (session-Rating of Perceived Exertion × duration for training/match and % maximal heart rate) and external load (total, low-, high-, and very high-intensity running distances) along with injury incidence rates were determined from 42 players over 3 seasons; including 1 without and 2 (season 2 and 3) with regular multi-match weeks. Within-player analyses compared 1 (n=214) vs. 2-match (n=86) weeks (>75min in matches), whilst team data was compared between seasons. Total injury rates were increased during multi-match weeks (p=0.001), resulting from increased match and training injuries (50.3, 16.9/1000h). Between-season total injury rates were highest when congested scheduling was greatest in season 3 (27.3/1000h) and season 2 (22.7/1000h) vs. season 1 (14.1/1000h; p=0.021). All external load measures were reduced in multi-match weeks (p
      Citation: Int J Sports Med ; : -
      PubDate: 2019-12-02T00:00:00+0100
      DOI: 10.1055/a-1028-7600
      Issue No: Vol. eFirst
  • Compression Garment-induced Leg Changes Increase Hemodynamic Responses in
           Healthy Individuals
    • Authors: Lee; Daniel C. W., Law, Helen Ka Wai, Ali, Ajmol, Sheridan, Sinead E., Wong, Stephen H. S., Lee, Shara Wee Yee
      Abstract: This study evaluated the morphological changes of the lower limb and associated hemodynamic responses to different lower-body compression pressures (COMPs) in physically active, healthy individuals at rest. Each of the 32 participants underwent three trials with three different degrees of lower-body compression applied: “Low” (2.2±1.4 mmHg), “Medium” (12.9±3.9 mmHg), and “High” (28.8±8.3 mmHg). In each COMP, a cross-sectional area of leg muscles (CSAmuscle), subcutaneous fat (CSAfat), superficial vessels (SupV), deep arteries (DA), and deep veins (DV) at the calf, knee, and thigh levels were measured using magnetic resonance imaging (MRI). Additionally, blood pressure (BP), heart rate (HR), cardiac output (CO), stroke volume (SV), and systemic vascular resistance (SVR) were measured using Doppler ultrasound (USCOM®). With High COMP, calf CSAmuscle and SupV were smaller (p
      Citation: Int J Sports Med ; : -
      PubDate: 2019-12-02T00:00:00+0100
      DOI: 10.1055/a-0970-5399
      Issue No: Vol. eFirst
  • The 400-m Front Crawl Test: Energetic and 3D Kinematical Analyses
    • Authors: Correia; Ricardo de Assis, Feitosa, Wellington Gomes, Figueiredo, Pedro, Papoti, Marcelo, Castro, Flávio Antonio de Souza
      Abstract: The aim of the study was to verify the relative contributions of energetic and kinematic parameters to the performance in 400-m front crawl test. Fourteen middle-distance swimmers participated in the study. Oxygen consumption was measured directly and blood samples were collected to assay lactate concentration. Both oxygen consumption and lactate concentration were used to calculate the: (i) overall energy expenditure, (ii) anaerobic (alactic and lactic) and (iii) aerobic contributions. The mean centre of mass speed and intracycle velocity variation were determined through three-dimensional kinematic analysis. Mean completion time was 315.64±26.91s. Energetic contributions were as follows: 6.1±0.28% from alactic anaerobic metabolism, 5.9±0.63% from anaerobic lactic and 87.8±0.88% from aerobic. Mean intracycle velocity variation was 0.14±0.03. The results indicated that performance of 400-m test relies predominantly on aerobic power. Parameters such as lactate, mean speed, anaerobic lactic and alactic (kW) correlated with performance of 400-m test (p
      Citation: Int J Sports Med ; : -
      PubDate: 2019-11-22T00:00:00+0100
      DOI: 10.1055/a-1023-4280
      Issue No: Vol. eFirst
  • Glenohumeral and Hip Range of Motion in Youth Softball Athletes
    • Authors: Friesen; Kenzie, Downs, Jessica, Wasserberger, Kyle, Shannon, David, Oliver, Gretchen D.
      Abstract: The purpose of this study was to compare measures of bilateral shoulder and hip range of motion (ROM) between youth softball pitchers and position players. Fifty-two youth softball athletes (12.7±2.1 yrs.; 160.28±10.98 cm; 59.31±15.07 kg) participated. Bilateral hip and shoulder ROM were measured among pitchers (n=29) and position players (n=23). A 2 (pitcher/position player) × 2 (dominant/non-dominant) ANOVA was performed for both internal and external rotation ROM for the shoulder and hip. Paired sample t-tests were also conducted to examine side-to-side differences in total ROM. Data revealed a significant interaction between position and side dominance. Specifically, position players have significantly more non-dominant shoulder external rotation ROM (106.92°± 9.14°) than pitchers (100.12°± 11.21°). There were no significant differences between throwing and non-throwing sides. It is important that coaches and clinicians are aware of these adaptations between overhand and underhand throwing in order to properly develop conditioning and rehabilitation programs to alleviate injury susceptibility and cater to position-specific demands. Additionally, the current data suggest many of the functional adaptations seen within older populations are not fully developed until after youth.
      Citation: Int J Sports Med ; : -
      PubDate: 2019-11-21T00:00:00+0100
      DOI: 10.1055/a-1019-7742
      Issue No: Vol. eFirst
  • Association between Muscle Damage and Head Impacts in High School American
    • Authors: Huibregtse; Megan E., Zonner, Steven W., Ejima, Keisuke, Bevilacqua, Zachary W., Newman, Sharlene D., Macy, Jonathan T., Kawata, Keisuke
      Abstract: Subconcussive head impacts (SHI), defined as impacts to the cranium that do not result in concussion symptoms, are gaining traction as a major public health concern. The contribution of physiological factors such as physical exertion and muscle damage to SHI-dependent changes in neurological measures remains unknown. A prospective longitudinal study examined the association between physiological factors and SHI kinematics in 15 high school American football players over one season. Players wore a sensor-installed mouthguard for all practices and games, recording frequency and magnitude of all head impacts. Serum samples were collected at 12 time points (pre-season, pre- and post-game for five in-season games, and post-season) and were assessed for an isoenzyme of creatine kinase (CK-MM) primarily found in skeletal muscle. Physical exertion was estimated in the form of excess post-exercise oxygen consumption (EPOC) from heart rate data captured during the five games. Mixed-effect regression models indicated that head impact kinematics were significantly and positively associated with change in CK-MM but not EPOC. There was a significant and positive association between CK-MM and EPOC. These data suggest that when examining SHI, effects of skeletal muscle damage should be considered when using outcome measures that may have an interaction with muscle damage.
      Citation: Int J Sports Med ; : -
      PubDate: 2019-11-20T00:00:00+0100
      DOI: 10.1055/a-1021-1735
      Issue No: Vol. eFirst
  • Early Warning of Suspected Doping from Biological Passport Based on
           Multivariate Trends
    • Authors: Nunes; António Júlio, Paixão, Paulo, Proença, Jorge, Silva, RicardoJ.N Bettencourt da
      Abstract: The indirect identification of doping in sports can be performed by assessing athletesʼ hematological perturbations from the analysis of blood collected on different occasions. Because prosecution for doping based on this information requires expensive and time-consuming interpretation of blood analysis results by various expert hematologists, mathematical data screening is performed to decide which cases should be forwarded to hematologists. The current Bayesian and univariate screening of data does not process the multivariate trends of blood parameters or take the time interval between samplings into account. This work presents a computational tool that overcomes these limitations by calculating a single score, the hematological perturbation index (HPIx), for which a threshold is defined above which hematologists should be asked to assess the athleteʼs biological passport. The doping detection from this index, normalized for days difference between samplings based on 3, 4 or 5 consecutive samplings, is associated with true positive result rates (TP) not below 98% and false positive result rates (FP) less than 0.9%. Therefore, this tool can be useful as an early warning system of hematological perturbations to decide which athletes should be more closely monitored and which biological passports should be forwarded to hematologists for medical interpretation of data.
      Citation: Int J Sports Med ; : -
      PubDate: 2019-11-20T00:00:00+0100
      DOI: 10.1055/a-1019-7774
      Issue No: Vol. eFirst
  • Injury Incidence Rates and Profiles in Elite Taekwondo during Competition
           and Training
    • Authors: Geßlein; Markus, Rüther, Johannes, Bail, Hermann Josef, Schuster, Philipp, Krutsch, Werner, Wolpert, Alexander Karl
      Abstract: This study aimed to investigate exposure adjusted injury incidence rates and profiles associated with training and competition in an elite taekwondo athlete population. 82 athletes were investigated for injuries over a period of 5 years. Individual fight time exposure for training and competition was recorded. The type and location of the injuries were classified and exposure-adjusted injury incidence rates (IIR) were calculated per 1000 h for training and competition. 66 athletes with a mean age of 19.3±4.2 years and 172 injuries were included in the final data assessment. The exposure adjusted IIR was significantly higher during competition (p
      Citation: Int J Sports Med ; : -
      PubDate: 2019-11-20T00:00:00+0100
      DOI: 10.1055/a-1021-1776
      Issue No: Vol. eFirst
  • Acute Impact of Recovery on the Restoration of Cellular Immunological
    • Authors: Wahl; Patrick, Mathes, Sebastian, Bloch, Wilhelm, Zimmer, Philipp
      Abstract: In view of the growing amount of (intense) training in competitive sports, quick recovery plays a superior role in performance restoration. The aim of the present study was to compare the effects of active versus passive recovery during high-intensity interval training (HIIT) and sprint interval training (SIT) protocols on acute alterations of circulating blood cells. Twelve male triathletes/cyclists performed 1) a HIIT consisting of 4×4 min intervals, 2) a SIT consisting of 4×30s intervals, separated by either active or passive recovery. Blood samples were collected immediately before and at 0’, 30’, 60’ and 180’ (minutes) post-exercise. Outcomes comprised leukocytes, lymphocytes, neutrophils, mixed cell count, platelets, cellular inflammation markers (neutrophil/lymphocyte-ratio (NLR), platelet/lymphocyte-ratio (PLR)), and the systemic immune-inflammation index (SII). In view of HIIT, passive recovery attenuated the changes in lymphocytes and neutrophils compared to active recovery. In view of SIT, active recovery attenuated the increase in leukocytes, lymphocytes and absolute mixed cell count compared to passive recovery. Both protocols, independent of recovery, significantly increased NLR, PLR and SII up to 3h of recovery compared to pre-exercise values. The mode of recovery influences short-term alterations in the circulating fraction of leukocytes, lymphocytes, neutrophils and the mixed cell count, which might be associated with different hormonal and metabolic stress responses due to the mode of recovery.
      Citation: Int J Sports Med ; : -
      PubDate: 2019-11-20T00:00:00+0100
      DOI: 10.1055/a-1015-0453
      Issue No: Vol. eFirst
School of Mathematical and Computer Sciences
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