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Journal Cover Sports Medicine International Open
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  This is an Open Access Journal Open Access journal
   ISSN (Online) 2367-1890
   Published by Thieme Publishing Group Homepage  [185 journals]
  • Does Physical Fatigue Affect Color Vision'

    • Authors: Tekavcic; Bor, Milić, Radoje Čedomir, Pompe, Manca Tekavcic
      Abstract: The purpose of this study was to establish whether physical fatigue affects color vision. Thirty healthy participants were included in the study (M:F=15:15), age 25.3±4.4 y, all professional or top amateur athletes. They were exhausted using the Wingate test (WT). Physical fatigue was determined by blood lactate level before the WT and 1, 3, 5, 7 and 10 min after. Color vision was evaluated using the Hardy-Rand-Rittler (HRR) and the Mollon-Reffin Minimalist (MRM) tests before the WT and 5, 10 and 30 min after. Five minutes after the WT 2/30 (6%) showed affected color vision in the protan axis and 25/30 (83%) in the tritan axis. Ten and 30 min after the WT all the participants showed normal color vision in both the deutan and protan axes, whereas 12/30 (40%) and 8/30 (26%), respectively, showed affected color vision in the tritan axis. A gender difference was observed in color vision deficiency and improvement, with female participants being affected more and longer. The study showed that intense physical effort affects color vision with the tritan axis being predominantly affected.
      Citation: Sports Medicine International Open 2017; 1: E153-E157
      PubDate: 2017-08-02T00:00:00+01:00
      DOI: 10.1055/s-0043-115378
      Issue No: Vol. 1, No. 05 (2017)
       
  • Upper Extremity Strength Imbalance after Mastectomy and the Effect of
           Resistance Training

    • Authors: Benton; Melissa J., Schlairet, Maura C.
      Abstract: The purpose of this non-randomized pre/post comparison trial was to explore the effect of resistance training (RT) on upper extremity strength imbalance in breast cancer survivors. Seventeen right-side dominant female breast cancer survivors (age: 58.2±2.7 years; BMI: 27.8±1.1 kg/m2) with right-sided (RSM) or left-sided (LSM) mastectomy completed strength testing (30-second arm curl) before and after an 8-week RT program. At baseline, LSM (n=8) had equal strength bilaterally (right=16.8±1.1 repetitions; left=16.4±1.4 repetitions), whereas RSM (n=9) had impaired strength on the right (16.7±1.3 repetitions) compared to the left (18.6±1.1 repetitions) side (p
      Citation: Sports Medicine International Open 2017; 1: E158-E163
      PubDate: 2017-08-02T00:00:00+01:00
      DOI: 10.1055/s-0043-115105
      Issue No: Vol. 1, No. 05 (2017)
       
  • Effect of Core Training on Trunk Flexor Musculature in Male Soccer Players

    • Authors: Takai; Yohei, Nakatani, Miyuki, Akamine, Takuya, Shiokawa, Katsuyuki, Komori, Daisuke, Kanehisa, Hiroaki
      Abstract: The present study aimed to elucidate the effect of core training on trunk flexor musculature in athletes. Twenty-eight collegiate male soccer players were randomly assigned to three groups: a training group that performed core exercises with wheeled platforms (WP), a training group that performed body mass-based core exercise (BME), and a control group that did not perform core exercise training (CON). WP and BME trained twice a week for 10 weeks. The WP performed 8–14 exercises with wheeled platforms. BME conducted four core exercises to failure. Before and after the intervention, trunk segment lean body mass (LBM) was measured using a whole-body dual-energy X-ray absorptiometry scanner. Muscle thicknesses (MTs) of the rectus abdominis (RA), external oblique, internal oblique (IO), and transverse abdominis were determined with an ultrasound apparatus. No significant changes for any measured variables were found in CON. In both training groups, the trunk segment LBM was significantly increased through the intervention. While MT for IO significantly increased in the two training groups, significant increases in MT for RA were found in only WP. For collegiate soccer players, the core training programs adopted here can be effective in increasing trunk segment LBM, but the effectiveness on the trunk flexor muscularity differs between the two training modalities.
      Citation: Sports Medicine International Open 2017; 1: E147-E154
      PubDate: 2017-08-09T00:00:00+01:00
      DOI: 10.1055/s-0043-115377
      Issue No: Vol. 1, No. 04 (2017)
       
  • Intra- and Inter-Day Reliability of Body Composition Assessed by a
           Commercial Multifrequency Bioelectrical Impedance Meter

    • Authors: Bosquet; Laurent, Niort, Thomas, Poirault, Maxime
      Abstract: The purpose of this study was to examine the intra- and inter-day reliability of body composition measurements provided by a commercial multifrequency bioelectrical impedance meter. Eighteen healthy, well-trained students in physical education from the same ethnic group were assessed on four consecutive days, both in the morning and in the evening. Indexes provided by the device were gathered in four categories: tissular, metabolic, hydric and ionic blocks. There was no systematic bias between repeated measures, regardless of time of day. Relative reliability was high to very high in the morning (0.72
      Citation: Sports Medicine International Open 2017; 1: E141-E146
      PubDate: 2017-07-14T00:00:00+01:00
      DOI: 10.1055/s-0043-113999
      Issue No: Vol. 1, No. 04 (2017)
       
  • Gender Differences of Achilles tendon Cross-sectional Area during Loading

    • Authors: Intziegianni; Konstantina, Cassel, Michael, Hain, Gerrit, Mayer, Frank
      Abstract: The Achilles tendon (AT) is larger and stiffer in males compared to females. AT stiffness is determined by length differences during loading. However, as some collagen fibres run transversely, changes in cross-sectional area (CSA) are also expected. The study investigates the gender differences of AT-CSA during maximal voluntary isometric contraction (MVIC).Fifteen males and fifteen females were positioned prone on the isokinetic dynamometer with knee extended and ankle flexed 90°. AT-CSA [mm2] from rest to MVIC during plantar flexion was sonographically assessed. AT-CSA maximal deformation [mm2] was subtracted by CSAMVIC–CSArest. AT-CSA compliance [mm2/Nm] and strain [%] were calculated by dividing the CSA deformation [mm2] by peak torque [Nm] and CSA at rest [mm2], respectively. Gender differences were assessed by an independent sample t-test with Bonferroni correction (α=0.01).AT-CSA dimensions at rest (p=0.001) and contraction (p=0.001) as well peak torque (p=0.001) were statistically significant higher in males (54.4±5.1 mm2, 53.7±5.1 mm2, 120.1±26.8 Nm) compared to females (46.2±7.0 mm2, 43.4±6.9 mm2, 86.9±21.6 Nm). AT-CSA deformation (p=0.000) strain (p=0.000) and compliance (p=0.000) were found to be statistically significant higher in females (–2.8±0.9 mm2, –6.2±2.0%, –0.033±0.018 mm2/Nm) compared to males (–0.8±1.8 mm2, –1.4±3.3%, –0.007±0.008 mm2/Nm).During loading, the AT also deforms at the transverse level by reducing its CSA. CSA reduction was higher in females, indicating also higher CSA compliance compared to males. Higher CSA compliance might indicate higher adaptability towards loading and might be discussed as a protective factor.
      Citation: Sports Medicine International Open 2017; 1: E135-E140
      PubDate: 2017-07-14T00:00:00+01:00
      DOI: 10.1055/s-0043-113814
      Issue No: Vol. 1, No. 04 (2017)
       
  • The Compact Wheelchair Roller Dynamometer

    • Authors: Oliveira; Saulo Fernandes Melo, Bione, Afonso Augusto Guimarães, Oliveira, Lúcia Inês Guedes Leite, da Costa, Adalberto Veronese, de Sá Pereira Guimarães, Fernando José, da Cunha Costa, Manoel
      Abstract: The equipment for evaluating the propulsion of a wheelchair is very complex and expensive. To validate a new dynamometer prototype for assessing the propulsion capacity of wheelchairs, 21 healthy subjects (age: 20.9±2.4 yr; weight: 68.9±7.9 kg; height: 174.0±7.1 cm; BMI: 22.7±2.5 kg·m−2) who do not normally require wheelchairs performed a sprint protocol for 20 s after a 1-min warm-up. The power and rotation data acquired by the prototype (both right and left sides) were compared with those of a reference system via high-speed videography (240 fps). The results showed high levels of accordance (95% CI), excellent values for the intraclass correlation coefficient (ICC: .99; P
      Citation: Sports Medicine International Open 2017; 1: E119-E127
      PubDate: 2017-07-05T00:00:00+01:00
      DOI: 10.1055/s-0043-111404
      Issue No: Vol. 1, No. 04 (2017)
       
  • Development of the Rope-Climbing Ergometer for Physical Training and
           Testing

    • Authors: Arakawa; Hiroshi, Kumagawa, Daisuke, Fujisaki, Iwao, Ozawa, Yoshiaki, Ishige, Yusuke
      Abstract: The purpose of this study was to develop and characterize a rope-climbing ergometer. A custom-made loading device that has an eddy current brake with an electrical current control circuit was developed to impose resistive load on the rope. A calibration test was first performed using a three-phase induction motor to associate the scale of the load-level setting (100 levels) with the resultant traction force. The calibration test yielded criteria values of loads (123 N at Level 0 and 1064 N at Level 100). The human test was carried out by 14 male subjects. The participants performed eight sets of 10-second maximal-effort exercises at different levels. Presumable trajectories of force, velocity, and power were obtained. The mean force increased by 161% (from 147.5 N at Level 0 to 383.7 N at Level 18), whereas the mean velocity decreased by 64.7% (from 1.87 m/s at Level 0 to 0.66 m/s at Level 18). The mean power reached its peak at Level 9 (320 W). The new rope ergometer for physical training and testing was successfully developed and characterized in this study. However, it remains to be seen whether its concurrent validity and reliability are qualifiable.
      Citation: Sports Medicine International Open 2017; 1: E128-E134
      PubDate: 2017-07-05T00:00:00+01:00
      DOI: 10.1055/s-0043-112335
      Issue No: Vol. 1, No. 04 (2017)
       
 
 
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