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https://www.readbyqxmd.com/read/28535098/ball-contact-injuries-in-11-national-collegiate-athletic-association-sports-the-injury-surveillance-program-2009-2010-through-2014-2015
#1
Melissa A Fraser, Dustin R Grooms, Kevin M Guskiewicz, Zachary Y Kerr
CONTEXT:   Surveillance data regarding injuries caused by ball contact in collegiate athletes have not been well examined and are mostly limited to discussions of concussions and catastrophic injuries. OBJECTIVE:   To describe the epidemiology of ball-contact injuries in 11 National Collegiate Athletic Association (NCAA) sports during the 2009-2010 through 2014-2015 academic years. DESIGN:   Descriptive epidemiology study. SETTING:   Convenience sample of NCAA programs in 11 sports (men's football, women's field hockey, women's volleyball, men's baseball, women's softball, men's and women's basketball, men's and women's lacrosse, and men's and women's soccer) during the 2009-2010 through 2014-2015 academic years...
May 23, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28535096/mandated-high-school-concussion-education-and-collegiate-athletes-understanding-of-concussion
#2
Miriam Carroll-Alfano
CONTEXT:   Concussions in student-athletes are a serious problem. Most states have enacted legislation mandating concussion education for student-athletes, under the assumption that education leads to better self-reporting of concussions and improved knowledge of symptoms. OBJECTIVE:   (1) To determine the effect of state-based concussion legislation on the proportion of student-athletes receiving concussion education and to assess the moderation of this effect by gender and sport and (2) to assess the effect of concussion education on student-athletes' knowledge of concussion symptoms and likelihood of seeking treatment after a concussion...
May 23, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28515975/prospective-functional-performance-testing-and-relationship-to-lower-extremity-injury-incidence-in-adolescent-sports-participants
#3
Joseph Smith, Nick DePhillipo, Iris Kimura, Morgan Kocher, Ronald Hetzler
BACKGROUND: Due to the high number of adolescent athletes and subsequent lower extremity injuries, improvements of injury prevention strategies with emphasis on clinic-based and practical assessments are warranted. PURPOSE: The purpose of this study was to prospectively investigate if a battery of functional performance tests (FPT) could be used as a preseason-screening tool to identify adolescent athletes at risk for sports-related acute lower extremity injury via comparison of injured and uninjured subjects...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28515832/a-low-dose-caffeine-and-carbohydrate-supplement-does-not-improve-athletic-performance-during-volleyball-competition
#4
David R Pfeifer, Kelsey M Arvin, Courtney N Herschberger, Nicholas J Haynes, Matthew S Renfrow
Dietary supplements are widely used to enhance sport performance and the combination of carbohydrate and caffeine (CHO+CAF) has yielded particularly high performance gains. Though the effects of a CHO+CAF supplement have been studied in a laboratory environment, little research exists on the effects of supplementation during competition. Therefore, the purpose of this study was to determine the effects of a CHO+CAF supplement on athletic performance in competition. Eight female collegiate volleyball players completed three testing sessions under three different conditions separated by approximately one week each: CHO+CAF supplement, placebo (PBO), and control (CTL) using a randomized, cross-over design...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28514920/predicting-factors-of-zone-4-attack-in-volleyball
#5
Gustavo C Costa, Henrique O Castro, Breno F Evangelista, Laura M Malheiros, Pablo J Greco, Herbert Ugrinowitsch
This study examined 142 volleyball games of the Men's Super League 2014/2015 seasons in Brazil from which we analyzed 24-26 games of each participating team, identifying 5,267 Zone 4 attacks for further analysis. Within these Zone 4 attacks, we analyzed the association between the effect of the attack carried out and the separate effects of serve reception, tempo and type of attack. We found that the reception, tempo of attack, second tempo of attack, and power of diagonal attack were predictors of the attack effect in Zone 4...
June 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/28514233/energy-balance-over-one-athletic-season
#6
Analiza M Silva, Catarina N Matias, Diana A Santos, Diana Thomas, Anja Bosy-Westphal, Manfred J Müller, Steven B Heymsfield, Luís B Sardinha
INTRODUCTION: Magnitude and variation in energy balance (EB) components over an athletic season are largely unknown. PURPOSE: We investigated the longitudinal changes in EB over one season and explored the association between EB variation and the change in the main fat-free mass (FFM) components in highly trained athletes. METHODS: Eighty athletes (54 males; handball, volleyball, basketball, triathlete, and swimming) were evaluated from the beginning of the season to the main competition stage...
March 22, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28488924/effects-of-caffeine-on-countermovement-jump-performance-variables-in-elite-male-volleyball-players
#7
Hermann Zbinden-Foncea, Isabel Rada, Jesus Gomez, Marco Kokaly, Trent Stellingwerff, Louise Deldicque, Luis Peñailillo
PURPOSE: To examine the effects of a moderate dose of caffeine in elite male volleyball players on countermovement jump (CMJ) performance, as well as temporal concentric and eccentric phase effects. METHODS: Ten elite male volleyball players took part in two experimental days via a randomized cross-over trial 1 week apart in which they ingested either 5 mg/kg of caffeine or a placebo in double-blind fashion. Heart rate and blood pressure parameters were measured at rest and 60 min post-ingestion...
May 10, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28469755/can-different-complex-training-improve-the-individual-phenomenon-of-post-activation-potentiation
#8
Zong-Rong Chen, Shin-Liang Lo, Min-Hsien Wang, Ching-Fang Yu, Hsien-Te Peng
The aims of the present study were (a) to determine whether the two types of complex training and vibration complex training would improve the individual phenomenon of post-activation potentiation (PAP) for every athlete in a team setting; and (b) to compare the acute effect of resistance and plyometric exercise, whole body vibration, complex training and vibration complex training on vertical jump performance. The participants were ten male division I college volleyball and basketball players. They were asked to perform three vertical jumps as a pre-test and were then randomly assigned to one of five PAP protocols, resistance exercise using half squat exercise, plyometric exercise using drop jumps with individualized drop height, whole body vibration using squats on a vibration plate, complex training combining resistance exercise with plyometric exercise, vibration complex training combining whole body vibration with plyometric exercise...
February 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28447871/the-effects-of-specialization-and-sex-on-anterior-y-balance-performance-in-high-school-athletes
#9
Madeline M Miller, Jessica L Trapp, Eric G Post, Stephanie M Trigsted, Timothy A McGuine, M Alison Brooks, David R Bell
BACKGROUND: Sport specialization and movement asymmetry have been separately discussed as potential risk factors for lower extremity injury. Early specialization may lead to the development of movement asymmetries that can predispose an athlete to injury, but this has not been thoroughly examined. HYPOTHESIS: Athletes rated as specialized would exhibit greater between-limb anterior reach asymmetry and decreased anterior reach distance on the Y-balance test (YBT) as compared with nonspecialized high school athletes, and these differences would not be dependent on sex...
April 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28416892/anthropometric-and-physical-characteristics-allow-differentiation-of-young-female-volleyball-players-according-to-playing-position-and-level-of-expertise
#10
M Milić, Z Grgantov, K Chamari, L P Ardigò, A Bianco, J Padulo
The aim of our study was to determine the differences in some anthropometric and physical performance variables of young Croatian female volleyball players (aged 13 to 15) in relation to playing position (i.e., independent variable) and performance level within each position (i.e., independent variable). Players were categorized according to playing position (i.e., role) as middle blockers (n=28), opposite hitters (n=41), passer-hitters (n=54), setters (n=30), and liberos (n=28). Within each position, players were divided into a more successful group and a less successful group according to team ranking in the latest regional championship and player quality within the team...
March 2017: Biology of Sport
https://www.readbyqxmd.com/read/28409510/combined-osteopathy-and-exercise-management-of-achilles-tendinopathy-in-an-athlete-a-case-report
#11
Georgia Ross, Chris Macfarlane, Brett Vaughan
Mid-portion Achilles tendinopathy is a common injury in sporting populations. There is conflicting evidence about the best approach to conservative management. This report focuses on the rehabilitation of an Achilles tendinopathy utilising osteopathic manual therapy (OMT) and a structured exercise program in a semi-professional volleyballer. The patient presented with a 4-month history of right mid-portion Achilles tendon pain that begun after a lateral inversion sprain of the right ankle. The primary complaint was pain impacting the patients vertical jump performance...
April 13, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28409140/osteoid-osteoma-of-the-distal-clavicle
#12
Bernardo Barcellos Terra, Leandro Marano Rodrigues, David Victoria Hoffmann Padua, Tannous Jorge Sassine, José Maria Cavatte, Anderson De Nadai
The osteoid osteoma is a bone tumor that accounts for 10% of benign tumors. It was described in 1935 by Jaffe, as a tumor that affects the young adult population, with a predominance of males. This study aims to present a case of late diagnosis of a patient with osteoid osteoma of the distal clavicle region. Female patient, 44 years old, non-professional volleyball player, reported pain in the anterior and superior region of the shoulder girdle, specifically in the acromioclavicular joint, which worsened at night and had been treated for nine months as tendinitis of the rotator cuff and acromioclavicular joint arthritis...
March 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28394742/side-to-side-differences-in-lower-extremity-biomechanics-during-multi-directional-jump-landing-in-volleyball-athletes
#13
Komsak Sinsurin, Sarun Srisangboriboon, Roongtiwa Vachalathiti
Side-to-side differences of lower extremities may influence the likelihood of injury. Moreover, adding the complexity of jump-landing direction would help to explain lower extremity control during sport activities. The aim was to determine the effects of limb dominance and jump-landing direction on lower extremity biomechanics. Nineteen female volleyball athletes participated. Both dominant limbs (DLs) and non-dominant limbs (NLs) were examined in single-leg jump-landing tests in four directions, including forward (0°), diagonal (30° and 60°), and lateral (90°) directions...
July 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28391770/differences-in-the-utilisation-of-active-power-in-squat-and-countermovement-jumps
#14
Damián Ferraro, Gabriel Fábrica
The aim of this article was to understand how active power is used in squat and countermovement jumps. A simple empirical model comprising a mass, a spring, an active element and a damper, together with an optimisation principle, was used to identify the mechanical factors that maximise performance of jumps without countermovement (squat jumps, SJ) and with countermovement (CMJ). Twelve amateur volleyball players performed SJ from two initial positions and CMJ with two degrees of counterbalancing, while kinematic data were collected (jump height, push-off duration and position of the centre of mass)...
July 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28391750/incidence-aetiology-and-prevention-of-musculoskeletal-injuries-in-volleyball-a-systematic-review-of-the-literature
#15
O Kilic, M Maas, E Verhagen, J Zwerver, V Gouttebarge
Currently, there is no overview of the incidence and (volleyball-specific) risk factors of musculoskeletal injuries among volleyball players, nor any insight into the effect of preventive measures on the incidence of injuries in volleyball. This study aimed to review systematically the scientific evidence on the incidence, prevalence, aetiology and preventive measures of volleyball injuries. To this end, a highly sensitive search strategy was built based on two groups of keywords (and their synonyms). Two electronic databases were searched, namely Medline (biomedical literature) via Pubmed, and SPORTDiscus (sports and sports medicine literature) via EBSCOhost...
July 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28382758/coaching-is-teamwork-the-role-of-need-supportive-coaching-and-the-motivational-climate-in-stimulating-proactivity-in-volleyball-teams
#16
S Van Puyenbroeck, J Stouten, G Vande Broek
Team sports settings are challenging, dynamic environments in which coaches often benefit from proactive players who take initiative in providing valuable suggestions and feedback. Based on self-determination theory and achievement goal theory, this study examined the mediating role of a mastery and performance motivational climate in the positive relation between coaches' psychological need-supportive behavior and team athletes' proactivity. The study sample consisted of 75 male and 105 female volleyball players (Mage =21...
April 6, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28370538/shoulder-position-sense-in-volleyball-players-with-infraspinatus-atrophy-secondary-to-suprascapular-nerve-neuropathy
#17
S Contemori, A Biscarini
Isolated infraspinatus atrophy (IIA) is a common condition among overhead-activity athletes, which affects the hitting shoulder and is caused by suprascapular nerve injury. As the suprascapular nerve is a mixed nerve, such damage could lead to reduced afferent proprioceptive information and impaired shoulder sensorimotor control. This study aimed to evaluate the proprioception of the shoulder with IIA, through the assessment of shoulder position sense. The shoulder position sense was assessed in 24 professional volleyball players (12 players with IIA and 12 healthy players) with a blind dynamic shoulder repositioning test (all participants were blindfolded during the test)...
March 29, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28358221/descriptive-epidemiology-of-non-time-loss-injuries-in-collegiate-and-high-school-student-athletes
#18
Zachary Y Kerr, Robert C Lynall, Karen G Roos, Sara L Dalton, Aristarque Djoko, Thomas P Dompier
CONTEXT:   Research on non-time-loss (NTL) injuries, which result in less than 24 hours of restriction from participation, is limited. OBJECTIVE:   To describe the epidemiology of NTL injuries among collegiate and high school student-athletes. DESIGN:   Descriptive epidemiology study. SETTING:   Aggregate injury and exposure data collected from a convenience sample of National College Athletic Association varsity teams and 147 high schools in 26 states...
May 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28344460/intra-and-inter-rater-reliability-of-the-modified-tuck-jump-assessment
#19
Azahara Fort-Vanmeerhaeghe, Alicia M Montalvo, Rhodri S Lloyd, Paul Read, Gregory D Myer
The Tuck Jump Assessment (TJA) is a clinician-friendly screening tool that was designed to support practitioners with identification of neuromuscular deficits associated with anterior cruciate ligament injury. This study aimed to evaluate the inter- and intra-rater reliability of the modified scoring (0 to 2) TJA to add an additional range of objectivity for each criterion. A total of 24 elite youth volleyball athletes (12 males and 12 females) were included in this study. Each participant's recorded performance of the TJA was scored independently by two raters across ten criteria using the modified scale...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28337878/salivary-cortisol-alpha-amylase-and-immunoglobulin-a-responses-to-a-morning-session-of-basketball-or-volleyball-training-in-boys-aged-14-18-years
#20
A Bruzda-Zwiech, M Konieczka, A Hilt, M Daszkowska, J Grzegorczyk, J Szczepańska
This study investigates whether a single session of routine morning basketball or volleyball training affects saliva levels of cortisol, alpha-amylase (sAA) and secretory immunoglobulin A (sIgA) in boys aged 14–18 years. Twenty-nine boys who participate in basketball or volleyball training, recruited from the Marcin Gortat’s Athletic Championship School in Lodz, were enrolled in the study. The 90-minute routine exercise program included 15 minutes of warm-up followed by basketball or volleyball practice. Unstimulated saliva samples were collected prior to and immediately after the exercise, and were analysed using ELISA...
January 2017: Journal of Biological Regulators and Homeostatic Agents
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