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https://www.readbyqxmd.com/read/28240706/manifestations-of-proprioception-during-vertical-jumps-to-specific-heights
#1
Struzik Artur, Pietraszewski Bogdan, Kawczyñski Adam, Winiarski Sławomir, Juras Grzegorz, Rokita Andrzej
Jumping and proprioception are important abilities in many sports. The efficiency of the proprioceptive system is indirectly related to jumps performed at specified heights. Therefore, this study recorded the ability of young athletes who play team sports to jump to a specific height compared to their maximum ability. A total of 154 male (age: 14.8±0.9 years, body height: 181.8±8.9 cm, body weight: 69.8±11.8 kg, training experience: 3.8±1.7 years) and 151 female (age: 14.1±0.8 years, body height: 170.5±6...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28229575/effects-of-a-low-volume-plyometric-training-in-anaerobic-performance-of-adolescent-athletes
#2
Ari R Assunção, Martim Bottaro, Euler A Cardoso, Daiane P Dantas da Silva, Marcelo Ferraz, Carlos A Vieira, Paulo Gentil
BACKGROUND: Parameters related to the anaerobic capacity and power may be important for the performance of many sports whose skills are related to high-intensity and short- duration efforts. Although plyometric training (PT) has been widely used in the regular strength and conditioning programs of young athletes, its effects on anaerobic performance are still controversial. Therefore, the purpose of the present study was to evaluate the effects of PT in anaerobic performance in young athletes...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28229568/yo-yo-ir1-vs-incremental-continuous-running-test-for-prediction-of-3000-m-performance
#3
Boris Schmitz, Andreas Klose, Katrin Schelleckes, Charlotte M Jekat, Michael Krüger, Stefan-Martin Brand
BACKGROUND: This study aimed to compare physiological responses during the Yo-Yo intermittent recovery level 1 (Yo-Yo IR1) test and an incremental continuous running field test (ICRT) and to analyze their predictive value on 3000 m running performance. METHODS: Forty moderately trained individuals (18 females) performed the ICRT and Yo-Yo IR1 test to exhaustion. The ICRT was performed as graded running test with an increase of 2.0 km·h-1 after each 3 min interval for lactate diagnostic...
February 22, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28225523/the-age-related-performance-decline-in-ironman-triathlon-starts-earlier-in-swimming-than-in-cycling-and-running
#4
Ilja Käch, Christoph A Rüst, Pantelis T Nikolaidis, Thomas Rosemann, Beat Knechtle
In Ironman triathlon, the number of overall male and female finishers increased in the last 30 years, while an improvement in performance has been reported. Studies concluding these numbers only analysed the top ten athletes per age group instead of all finishers, therefore a selection bias might have occurred. The aim of the present study was to investigate participation, performance and the age-related performance decline of all pro and age group triathletes ranked in all Ironman triathlons held worldwide between 2002 and 2015...
February 21, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28222141/evaluation-of-factors-associated-with-severe-and-frequent-back-pain-in-high-school-athletes
#5
Matias Noll, Erika Aparecida Silveira, Ivan Silveira de Avelar
Several studies have shown that half of all young athletes experience back pain (BP). However, high intensity and frequency of BP may be harmful, and the factors associated with BP severity have not been investigated in detail. Here, we investigated the factors associated with a high intensity and high frequency of BP in high school athletes. We included 251 athletes (173 boys and 78 girls [14-20 years old]) in this cross-sectional study. The dependent variables were a high frequency and high intensity of BP, and the independent variables were demographic, socioeconomic, psychosocial, hereditary, anthropometric, behavioural, and postural factors and the level of exercise...
2017: PloS One
https://www.readbyqxmd.com/read/28214098/is-perceived-athlete-leadership-quality-related-to-team-effectiveness-a-comparison-of-three-professional-sports-teams
#6
Katrien Fransen, S Alexander Haslam, Clifford J Mallett, Niklas K Steffens, Kim Peters, Filip Boen
OBJECTIVES: Researchers have argued that leadership is one of the most important determinants of team effectiveness. The present study examined the extent to which the perceived quality of athlete leadership was related to the effectiveness of elite sports teams. DESIGN: Three professional football teams (N=135) participated in our study during the preparation phase for the Australian 2016 season. METHODS: Players and coaching staff were asked to assess players' leadership quality in four leadership roles (as task, motivational, social, and external leader) via an online survey...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28213754/low-energy-availability-menstrual-dysfunction-and-low-bone-mineral-density-in-individuals-with-a-disability-implications-for-the-para-athlete-population
#7
REVIEW
Cheri A Blauwet, Emily M Brook, Adam S Tenforde, Elizabeth Broad, Caroline H Hu, Eliza Abdu-Glass, Elizabeth G Matzkin
Low energy availability, functional hypothalamic amenorrhea, and low bone mineral density are three interrelated conditions described in athletic women. Although described as the female athlete triad (Triad), males experience similar health concerns. The literature suggests that individuals with a disability may experience altered physiology related to these three conditions when compared with the able-bodied population. The goal of this review is to describe the unique implications of low energy availability, low bone mineral density, and, in females, menstrual dysfunction in individuals with a disability and their potential impact on the para athlete population...
February 17, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28210652/prevention-of-hamstring-injuries-in-collegiate-sprinters
#8
Yusaku Sugiura, Kazuhiko Sakuma, Keishoku Sakuraba, Yamato Sato
BACKGROUND: No studies have been reported on how strength, agility, and flexibility training reduce the occurrence of hamstring injuries in sprinters. Therefore, a program for preventing hamstring injury in these athletes has not been established. PURPOSE: To document the incidence of hamstring injuries during times when different prevention strategies were employed to see whether a particular prevention program reduced their occurrence. STUDY DESIGN: Descriptive epidemiology study...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28203217/a-comparison-of-players-and-coaches-perceptions-of-the-coach-created-motivational-climate-within-youth-soccer-teams
#9
Nina Elise Møllerløkken, Håvard Lorås, Arve Vorland Pedersen
The coach-created motivational climate within youth sports teams has been shown to be of great importance for the quality of youths' sports experiences as well as their motivation for continuing or discontinuing sport participation. While the player's perspective on motivational climates has been studied extensively, the coach's perspective has received considerably less attention. Thus, little is known about the concordance of perceptions of the motivational climate between coaches and their players, or the lack thereof...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28199800/preventive-biomechanics
#10
Timothy E Hewett, Nathaniel A Bates
BACKGROUND: Preventive medicine techniques have alleviated billions of dollars' worth of the economic burden in the medical care system through the implementation of vaccinations and screenings before the onset of disease symptoms. Knowledge of biomechanical tendencies has progressed rapidly over the past 20 years such that clinicians can identify, in healthy athletes, the underlying mechanisms that lead to catastrophic injuries such as anterior cruciate ligament (ACL) ruptures. As such, preventive medicine concepts can be applied to noncontact musculoskeletal injuries to reduce the economic burden of sports medicine treatments and enhance the long-term health of athletes...
February 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28198605/the-effect-of-gymnastic-training-on-muscle-strength-and-co-activation-during-isometric-elbow-and-glenohumeral-flexion-extension
#11
Andrzej Kochanowicz, Bartłomiej Niespodziński, Jan Mieszkowski, Kazimierz Kochanowicz, Stanisław Sawczyn
BACKGROUND: The purpose of the study was to demonstrate the differences between non- athletes and gymnasts at the pre- and post-pubertal age in the development of peak torque and ensuing flexion/extension ratios at the elbow and the glenohumeral joints, as well as to assess the relevance of the above activities for the co-activation of selected muscles. METHODS: The study involved 20 gymnasts and 20 non-athletes aged 8-9 years, in addition to 12 gymnasts and 16 non-athletes aged 18-25 years...
February 14, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28195977/fat-grip-resistance-training-improves-driving-performance-in-division-i-male-golfers
#12
Patrick M Cummings, Hunter S Waldman, Ben M Krings, JohnEric W Smith, Matthew J McAllister
Fat Grip (FG) training is implemented into strength and conditioning programs with the overall goal of increasing grip strength. Previous research assessing the effect of training with increased grip diameters compared to standard Olympic bar diameters has mainly been in acute settings. Therefore, the purpose of this study was to examine to effects FG training compared to normal diameter grip (CON) training during an eight week periodized resistance training (RT) program in Division I male golfers. Subjects (n = 10) were randomly assigned into two groups: the FG group (n = 5, scoring average: 75...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28178579/comparison-of-head-impact-location-during-games-and-practices-in-division-iii-men-s-lacrosse-players
#13
Kathleen M O'Day, Elizabeth M Koehling, Lydia R Vollavanh, Debbie Bradney, James M May, Katherine M Breedlove, Evan L Breedlove, Price Blair, Eric A Nauman, Thomas G Bowman
BACKGROUND: Head impacts have been studied extensively in football, but little similar research has been conducted in men's lacrosse. It is important to understand the location and magnitude of head impacts during men's lacrosse to recognize the risk of head injury. METHODS: Descriptive epidemiology study set on collegiate lacrosse fields. Eleven men's lacrosse players (age=20.9±1.13years, mass=83.91±9.04kg, height=179.88±5.99cm) volunteered to participate. We applied X2 sensors behind the right ear of participants for games and practices...
January 27, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28177751/evidence-of-nonlocal-muscle-fatigue-in-male-youth
#14
Aymen Ben Othman, Anis Chaouachi, Raouf Hammami, Mehdi M Chaouachi, Sofien Kasmi, David G Behm
Evidence for nonlocal muscle fatigue (NLMF) has been inconsistent in adults, with no studies investigating youth. The objective was to examine NLMF in youth. Forty-two young males (age, 10-13 years) were tested for maximal voluntary isometric contraction (MVIC) force of the ipsilateral and contralateral knee extensors at 90° and 120° knee flexion, elbow flexors at 90°, handgrip, knee extensor isokinetic torque (300°·s(-1) analyzed at 90° and 120° knee flexion), as well as a unilateral countermovement jump (CMJ) and Y Balance test (YBT)...
March 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28177711/the-influence-of-genetic-polymorphisms-on-performance-cardiac-and-hemodynamic-parameters-among-brazilian-soccer-players
#15
Thiago José Dionísio, Carlos Rogério Thiengo, Daniel Thomas Brozoski, Evandro José Dionísio, Guilherme Augusto Talamoni, Roberto Braga Silva, Gustavo Pompermaier Garlet, Carlos Ferreira Santos, Sandra Lia Amaral
This study investigated whether ACTN3 R577X, AMPD1 C34T, I/D ACE and M235T AGT polymorphisms can affect performance tests such as jumping, sprinting and endurance in 220 young male athletes from professional minor league soccer team from São Paulo Futebol Clube, Brazil. I/D ACE and M235T AGT polymorphisms were also analyzed according to cardiac and hemodynamic parameters. Athletes were grouped or not by age. DNA from saliva and Taqman® assays were used for genotyping 220 athletes and the results were associated with performance tests...
January 24, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28163571/prevalence-patterns-and-correlates-of-equestrian-injuries-in-malaysia-a-cross-sectional-study
#16
Nizar A Majeedkutty, Nor A B Khairulanuar
BACKGROUND: Equestrian sport carries with it an implicit risk of injury. Despite the frequency of injuries in equestrian sports, there is no published study on injuries of equestrian athletes in Malaysia. OBJECTIVE: The objective of this study was to determine the prevalence of injuries and its correlates among horseback riders. SUBJECTS AND METHODS: A web-based standardized questionnaire was used to collect data for this cross-sectional survey...
January 2017: Journal of Family & Community Medicine
https://www.readbyqxmd.com/read/28151781/acute-effects-of-eccentric-overload-on-concentric-front-squat-performance
#17
Cameron N Munger, David C Archer, Whitney D Leyva, Megan A Wong, Jared W Coburn, Pablo B Costa, Lee E Brown
Eccentric overload is used to enhance performance. The purpose of this study was to investigate the acute effects of eccentric overload on concentric front squat performance. Twenty resistance-trained males (age=23.80±1.82yrs, ht=176.95±5.21cm, mass=83.49±10.43kg, 1 Repetition Maximum [1RM] front squat=131.02±21.32kg) volunteered. A dynamic warm-up and warm-up sets of front squat were performed. Eccentric hooks were added to the barbell. They descended for 3 seconds, until eccentric hooks released, and performed the concentric phase as fast as possible...
January 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28150178/the-effect-of-concurrent-plyometric-training-versus-submaximal-aerobic-cycling-on-rowing-economy-peak-power-and-performance-in-male-high-school-rowers
#18
Julian D Egan-Shuttler, Rohan Edmonds, Cassandra Eddy, Veronica O'Neill, Stephen J Ives
BACKGROUND: Plyometric training has been shown to increase muscle power, running economy, and performance in athletes. Despite its use by rowing coaches, it is unknown whether plyometrics might improve rowing economy or performance. The purpose was to determine if plyometric training, in conjunction with training on the water, would lead to improved rowing economy and performance. METHODS: Eighteen male high school rowers were assigned to perform 4 weeks of either plyometric training (PLYO, n = 9) or steady-state cycling below ventilatory threshold (endurance, E, n = 9), for 30 min prior to practice on the water (matched for training volume) 3 days per week...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28150163/fatigue-and-recovery-in-rugby-a-review
#19
REVIEW
Francisco Tavares, Tiaki Brett Smith, Matthew Driller
The physical demands and combative nature of rugby lead to notable levels of muscle damage. In professional rugby, athletes only have a limited timeframe to recover following training sessions and competition. Through the implementation of recovery strategies, sport scientists, practitioners and coaches have sought to reduce the effect of fatigue and allow athletes to recover faster. Although some studies demonstrate that recovery strategies are extensively used by rugby athletes, the research remains equivocal concerning the efficacy of recovery strategies in rugby...
February 2, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28149387/determinants-of-feedback-retention-in-soccer-players
#20
Nuno Januário, António Rosado, Isabel Mesquita, José Gallego, José M Aguilar-Parra
This study analyzed soccer players' retention of coaches' feedback during training sessions. We intended to determine if the retention of information was influenced by the athletes' personal characteristic (age, gender and the sports level), the quantity of information included in coach's feedback (the number of ideas and redundancy), athletes' perception of the relevance of the feedback information and athletes' motivation as well as the attention level. The study that was conducted over the course of 18 sessions of soccer practice, involved 12 coaches (8 males, 4 females) and 342 athletes (246 males, 96 females), aged between 10 and 18 years old...
June 1, 2016: Journal of Human Kinetics
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