Abstract:
:Athletes in sports such as the gymnastics who perform the still rings cross position are disadvantaged due to a lack of objective and convenient measurement methods. The gymnastics "cross "is a held isometric strength position considered fundamental to all still rings athletes. The purpose of this investigation was to determine if two small force platforms (FPs) placed on supports to simulate a cross position could demonstrate the fidelity necessary to differentiate between athletes who could perform a cross from those who could not. Ten gymnasts (5 USA Gymnastics, Senior National Team, and 5 Age Group Level Gymnasts) agreed to participate. The five Senior National Team athletes were grouped as cross Performers; the Age Group Gymnasts could not successfully perform the cross position and were grouped as cross Non- Performers. The two small FPs were first tested for reliability and validity and were then used to obtain a force-time record of a simulated cross position. The simulated cross test consisted of standing between two small force platforms placed on top of large solid gymnastics spotting blocks. The gymnasts attempted to perform a cross position by placing their hands at the center of the FPs and pressing downward with sufficient force that they could remove the support of their feet from the floor. Force-time curves (100 Hz) were obtained and analyzed for the sum of peak and mean arm ground reaction forces. The summed arm forces, mean and peak, were compared to body weight to determine how close the gymnasts came to achieving forces equal to body weight and thus the ability to perform the cross. The mean and peak summed arm forces were able to statistically differentiate between athletes who could perform the cross from those who could not (p < 0.05). The force-time curves and small FPs showed sufficient fidelity to differentiate between Performer and Non- Performer groups. This experiment showed that small and inexpensive force platforms may serve as useful adjuncts to athlete performance measurement such as the gymnastics still rings cross. Key pointsStrength-related skills are difficult to assess in some sports and thus require special means.Small force platforms have sufficient fidelity to assess the differences between gymnasts who can perform a still rings cross from those who cannot.Strength assessment via small force platforms may serve as a means of assessing skill readiness, strength symmetry, and progress in learning a still rings cross.
journal_name
J Sports Sci Medjournal_title
Journal of sports science & medicineauthors
Dunlavy JK,Sands WA,McNeal JR,Stone MH,Smith SL,Jemni M,Haff GGsubject
Has Abstractpub_date
2007-03-01 00:00:00pages
93-7issue
1issn
1303-2968journal_volume
6pub_type
杂志文章abstract::The main objective of this study was to perform a biomechanical analysis of three different sprint start patterns to determine the safest position in term of neck injury and Sport-Related Concussion (SRC). The second objective was to collect data on the learning process effect between football players and non-players....
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2014-05-01 00:00:00
abstract::The Objectives of the study were to investigate whether 400 µg inhaled salbutamol influences 3 km running time-trial performance and lung function in eucapnic voluntary hyperpnoea positive (EVH+ve) and negative (EVH-ve) individuals. Fourteen male participants (22.4 ± 1.6yrs; 76.4 ± 8.7kg; 1.80 ± 0.07 m); (7 EVH+ve; 7 ...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2017-12-01 00:00:00
abstract::The aims of the present study were to establish a detailed and representative record of landing techniques (two-, left-, and right-footed landings) in professional beach volleyball and compare the data with those of indoor volleyball. Beach volleyball data was retrieved from videos taken at FIVB World Tour tournaments...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2013-09-01 00:00:00
abstract::This study aimed to describe and compare the ventilation behavior during an incremental test utilizing three mathematical models and to compare the feature of ventilation curve fitted by the best mathematical model between aerobically trained (TR) and untrained (UT) men. Thirty five subjects underwent a treadmill test...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2008-09-01 00:00:00
abstract::The aim of this study was to characterize the backstroke swimming technique of 11-13 year-old swimmers when performing at very high intensity. A sample of 114 swimmers was divided into four groups regarding maturational and gender effect, who performed 25- m backstroke swimming at 50-m pace. Using two underwater camer...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2013-12-01 00:00:00
abstract::A table tennis player should fixate at different distances; track the objects with different speed, and in different visual environment. Their visual skills must be well developed for these capabilities. Therefore, visual acuity in reduced lumination and facility of ocular accommodation those are two criteria for visu...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2004-03-01 00:00:00
abstract::The aim was to determine the rotational torque occurring at the shoe-natural grass interface during golf swing performance with different clubs, and to determine the influence of handicap and golf shoe design. Twenty-four golfers (8 low 0-7; 8 medium 8-14; and 8 high 15+) performed 5 shots with a driver, 3-iron and 7-...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2008-09-01 00:00:00
abstract::The purpose of this study was to test a motivational model of the coach-athlete relationship, based on self-determination theory and on the hierarchical model of intrinsic and extrinsic motivation. The sample comprised of 608 athletes (ages of 12-17 years) completed the following measures: interest in athlete's input,...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2010-03-01 00:00:00
abstract::This was a placebo-controlled, double-blind study designed to evaluate the effect of a commercially available dietary supplement on upper-respiratory tract symptoms (URTI) and mood state. Seventy-five marathon runners (35 men, 40 women) ranging in age from 18-53 years, mean age: 36 ± 9, self-administered placebo, 250 ...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2009-12-01 00:00:00
abstract::Trapezoid fractures are relatively rare upper limb fractures. The case report of a trapezoid stress fracture in the dominant hand of a 22 year old international standard shot-putter is presented. ...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2012-12-01 00:00:00
abstract::An os acromiale (OA) arises from a fusion failure of the anterior acromial apophysis. This case report presents the successful management of a painful OA associated to rotator cuff impingement in a competitive swimmer, based on ultrasonographic diagnosis and conservative management. Rest from sport activity, oral anti...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2012-06-01 00:00:00
abstract::The purpose of this investigation was to use a combination of image processing, force measurements and finite element modeling to calculate deformation of the knee cartilage during jumping. Professional athletes performed jumps analyzed using a force plate and high-speed video camera system. Image processing was perfo...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2009-12-01 00:00:00
abstract::The aim of this study was to compare heart rate (HR), blood lactate (LA) and rate of perceived exertion (RPE) responses to a tennis-specific interval training (i.e., on-court) session with that of a matched-on-time running interval training (i.e., off-court). Eight well-trained, male (n = 4) and female (n = 4) tennis ...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2011-09-01 00:00:00
abstract::Mountain endurance running has increased in popularity in recent years. Thus the aim of the present study was to determine if maximal oxygen uptake (VO2max) and energy cost of running (Cr) measured during level and uphill running are associated. Ten high level male endurance mountain runners performed three maximal ox...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2016-05-23 00:00:00
abstract::The primary purpose of this study was to identify potential risk factors for sports injuries in professional basketball. An observational retrospective cohort study involving a male professional basketball team, using game tracking data was conducted during three consecutive seasons. Thirty-three professional basketba...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2018-05-14 00:00:00
abstract::Neuromuscular electrical stimulation (NMES) may be used to prevent strength loss associated with post-surgical immobilization. Most studies testing the effectiveness of NMES have trained the knee extensors. The purpose of this investigation was to test the effectiveness of NMES when training the elbow flexors. Twenty-...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2006-06-01 00:00:00
abstract::High altitude exposure results in decreased oxygen pressure and an increased formation of reactive oxygen and nitrogen species (RONS), which is often associated with increases in oxidative damage to lipids, proteins and DNA. Exposure to high altitude appears to decrease the activity and effectiveness of antioxidant en...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章,评审
doi:
更新日期:2004-06-01 00:00:00
abstract::A percentage of either measured or predicted maximum heart rate is commonly used to prescribe and measure exercise intensity. However, maximum heart rate in athletes may be greater during competition or training than during laboratory exercise testing. Thus, the aim of the present investigation was to determine if end...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2008-12-01 00:00:00
abstract::The aim of this study was to assess changes in indirect markers of muscle damage and type I collagen degradation, as well as, patellar and Achilles tendon morphological differences during nine daily drop-jumps sessions with constant load alternated with rapid increases in load to test the hypothesis that frequent drop...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2015-11-24 00:00:00
abstract::Older women may have chronic or age-related conditions that increase the risk of falls or that limit their ability to remain active. It is unclear if a water-based exercise program provides a safe and effective alternative to land-based exercise. The purpose of this study was to evaluate the impact of a water-based ex...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2013-12-01 00:00:00
abstract::Female breasts are vulnerable to direct blows or frictional injuries during sport; however, little research has investigated breast injuries experienced by female athletes. This study aimed to investigate the occurrence, causes and perceived performance effects of breast injuries in elite female athletes across a wide...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2019-08-01 00:00:00
abstract::This study investigated the factorial validity of the 33-item self-rated Emotional Intelligence Scale (EIS: Schutte et al., 1998) for use with athletes. In stage 1, content validity of the EIS was assessed by a panel of experts (n = 9). Items were evaluated in terms of whether they assessed EI related to oneself and E...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2009-06-01 00:00:00
abstract::The study of the physiological adaptations of skeletal muscle in response to eccentric (ECC) contraction is based on protocols in which exercise intensities are determined relative to the concentric (CON) reference exercise (as percentage of the CON maximal oxygen consumption, or VO2max). In order to use similar exerc...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2014-09-01 00:00:00
abstract::Forehand groundstroke effectiveness is important for tennis success. Ball topspin angular velocity (TAV) and accuracy are important for forehand groundstroke effectiveness, and have been extensively studied, previously; despite previous, quality studies, it was unclear whether certain racquet kinematics relate to ball...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2017-12-01 00:00:00
abstract::Regular exercise has the capability of decreasing the incidence and progress of certain cancers. Murine sarcoma, (S-180) cells were transplanted to control (TC), exercise trained (10 week, 1 hour day, 5 times/ week) mice, which had the swimming training terminated at the time of transplantation (ETT), and also to a gr...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2011-03-01 00:00:00
abstract::This study evaluated the effects of high-dose of short-term creatine supplementation (5g.kg(-1).day(-1) to 1 week) and long-term creatine supplementation (1g.kg(-1). day(-1) to 4-8 weeks) on kidney and liver structure and function of sedentary and exercised Wistar rats (Exercise sessions consisted of swimming at 80% o...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2009-12-01 00:00:00
abstract::The aim of this study was to determine the effect of immobilising the knee and hip on the oxygen cost (ml·kg(-1)·min(-1)) to velocity relationship during treadmill walking. The study was a prospective experimental conducted in a Rehabilitation centre. Ten healthy individuals, five men and five women, with no gait abno...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2006-12-15 00:00:00
abstract::Stride length, hip, knee and ankle angles were compared during barefoot and shod running on a treadmill at two speeds. Nine well-trained (1500m time: 3min:59.80s ± 14.7 s) male (22 ±3 years; 73 ±9 kg; 1.79 ±0.4 m) middle distance (800 m - 5,000 m) runners performed 2 minutes of running at 3.05 m·s-1 and 4.72 m·s-1 on ...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2016-08-05 00:00:00
abstract::The purpose of this study was to investigate a large number of determinants of sport dropout among French adolescents, in order to reveal proximal and distal factors of dropout. 261 current and 106 dropout athletes (M = 14.6) participated to the study. The data were collected by a questionnaire assessing demographic i...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2009-03-01 00:00:00
abstract::This study compared stride length, stride frequency, contact time, flight time and foot-strike patterns (FSP) when running barefoot, and in minimalist and conventional running shoes. Habitually shod male athletes (n = 14; age 25 ± 6 yr; competitive running experience 8 ± 3 yr) completed a randomised order of 6 by 4-mi...
journal_title:Journal of sports science & medicine
pub_type: 杂志文章
doi:
更新日期:2014-05-01 00:00:00