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https://www.readbyqxmd.com/read/29199783/physical-and-technical-demands-of-elite-beach-volleyball-according-to-playing-position-and-gender
#1
Simone Natali, Davide Ferioli, Antonio LA Torre, Matteo Bonato
BACKGROUND: Beach volleyball is a team sport played by two teams of two players on a sand court divided by a net. To date, research has mainly focused on male beach volleyball players. Therefore, the aim of this study was to assess work-rest ratio and physical actions between males and females according to their role. METHODS: Forty-two elite beach volley players (24 males and 18 females) were filmed during 12 beach volleyball matches of the Swatch Major Series 2016 of the beach volleyball World Tour in Poreč in (Croatia)...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29189580/comparison-of-body-composition-variables-across-a-large-sample-of-ncaa-women-athletes-from-six-competitive-sports
#2
Jennifer B Fields, Casey J Metoyer, Jason C Casey, Michael R Esco, Andrew R Jagim, Margaret T Jones
Body composition (BC) plays a critical role in sport performance and athlete health. Body size and BC have been widely studied in men's sports, with reported changes observed over time. However, a paucity of current data exists in women athletes. The purpose of the current descriptive study was to measure and compare BC data for collegiate women athletes from six competitive sports. A total of 524 athletes from two NCAA institutions participated: basketball (BB; n = 95), gymnastics (GYM; n = 42), lacrosse (LAX; n = 81), rowing (ROW; n = 57), soccer (SOC; n = 188), and volleyball (VB; n = 61)...
November 16, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29181262/exercise-manual-therapy-and-postural-re-education-for-uncontrolled-ear-twitching-and-related-impairments-after-whiplash-injury-a-case-report
#3
Kelsey Flanders, Heather Feldner
Background and Purpose: Whiplash Associated Disorders and the interventions used to remediate them are well documented in physical therapy literature. However, specific interventions for spasms of the neck musculature that also involve constant ear twitching have yet to be addressed. The purpose of this case report is twofold. First, to describe comprehensive physical therapy management and outcomes for a subject with uncontrolled ear twitching and related musculoskeletal impairments, and second, to discuss the physical therapist's approach to evidence-based care when faced with a paucity of literature addressing physical therapy interventions for subjects with uncontrolled ear twitching...
October 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29162768/coexistence-of-trunk-or-lower-extremity-pain-with-elbow-and-or-shoulder-pain-among-young-overhead-athletes-a-cross-sectional-study
#4
Takuya Sekiguchi, Yoshihiro Hagiwara, Haruki Momma, Masahiro Tsuchiya, Kaoru Kuroki, Kenji Kanazawa, Yutaka Yabe, Shinichiro Yoshida, Masashi Koide, Nobuyuki Itaya, Eiji Itoi, Ryoichi Nagatomi
Elbow or shoulder injuries are common in overhead sports. Because energy derived from the lower extremity passes through the trunk to the upper extremity in overhead motion, a break in such a kinetic chain could lead to arm injuries. However, there is only limited information about the role of the trunk and lower extremity support in preventing elbow or shoulder injuries. This study aimed to explore the association of trunk and lower extremity pain with elbow/shoulder pain among young overhead athletes. We conducted a cross-sectional study using self-reported questionnaires mailed to young athletes belonging to the Miyagi Amateur Sports Association...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29160161/serum-from-differently-exercised-subjects-induces-myogenic-differentiation-in-lhcn-m2-human-myoblasts
#5
D Vitucci, E Imperlini, R Arcone, A Alfieri, A Canciello, L Russomando, D Martone, A Cola, G Labruna, S Orrù, D Tafuri, A Mancini, P Buono
Myogenesis is the formation of muscle tissue from muscle precursor cells. Physical exercise induces satellite cell activation in muscle. Currently, C2C12 murine myoblast cells are used to study myogenic differentiation. Herein, we evaluated whether human LHCN-M2 myoblasts can differentiate into mature myotubes and express early (myotube formation, creatine kinase activity and myogenin) and late (MyHC-β) muscle-specific markers when cultured in differentiation medium (DM) for 2, 4 and 7 days. We demonstrate that treatment of LHCN-M2 cells with DM supplemented with 0...
November 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29158956/validity-of-functional-screening-tests-to-predict-lost-time-lower-quarter-injury-in-a-cohort-of-female-collegiate-athletes
#6
P David Walbright, Nicole Walbright, Heidi Ojha, Todd Davenport
Background: Lower quarter injuries account for more than 50% of all injuries in collegiate athletics. Neuromuscular screening tests could potentially identify athletes who are at risk for sustaining an injury. While previous research has studied individual tests, the authors of this paper are unaware of any study that has compared diagnostic accuracy of multiple neuromuscular screening tests within one study cohort. Hypothesis/Purpose: The purpose of this study was to examine the accuracy of three common neuromuscular screening tests to predict the occurrence of a lower quarter injury in female collegiate volleyball and basketball players...
November 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29158725/nutritional-supplement-practices-of-professional-ugandan-athletes-a-cross-sectional-study
#7
Haruna Muwonge, Robert Zavuga, Peninnah Aligawesa Kabenge, Timothy Makubuya
Background: The use of nutritional supplements (NS) places athletes at great risk for inadvertent doping. Due to the paucity of data on supplement use, this study aimed to determine the proportion of Ugandan athletes using nutritional supplements and to investigate the athletes' motivation to use these supplements. Methods: A cross-sectional study was conducted in which an interviewer-administered questionnaire was used to collect data from 359 professional athletes participating in individual (boxing, cycling, athletics) and team (basketball, rugby, football, netball, and volleyball) sports...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29158621/loaded-and-unloaded-jump-performance-of-top-level-volleyball-players-from-different-age-categories
#8
Katia Kitamura, Lucas Adriano Pereira, Ronaldo Kobal, Cesar Cavinato Cal Abad, Ronaldo Finotti, Fábio Yuzo Nakamura, Irineu Loturco
The aim of this study was to investigate the differences in loaded and unloaded jump performances between different age categories of top-level volleyball players from the same club. Forty-three volleyball players were divided into four age groups: under-17, under-19, under-21 and professional. Vertical jumping height for squat jump (SJ), countermovement jump (CMJ) and CMJ with arm swing (CMJa) and mean propulsive velocity (MPV) in the loaded jump squat exercise with 40% of the athlete's body mass were compared among the different age categories, considering body mass as a covariate...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29158616/validation-of-the-vert-wearable-jump-monitor-device-in-elite-youth-volleyball-players
#9
Thiago O Borges, Alexandre Moreira, Renato Bacchi, Ronaldo L Finotti, Mayara Ramos, Charles R Lopes, Marcelo S Aoki
This technical report aims to determine the validity and the accuracy of the VERT Wearable Jump Monitor. The participants of this study were all experienced volleyball players from the U18 category from the Brazilian National team. To assess jump performance, the VERT scores were compared to the VERTEC (jump and reach device). Each athlete performed 3 attack and 3 block jumps in a random, counterbalanced order, and the average score was registered. In the attack jumps, the VERTEC and VERT mean ± SD scores were 70...
September 2017: Biology of Sport
https://www.readbyqxmd.com/read/29156410/how-do-we-learn-to-kill-in-volleyball-the-role-of-working-memory-capacity-and-expertise-in-volleyball-motor-learning
#10
Elisa Bisagno, Sergio Morra
This study examines young volleyball players' learning of increasingly complex attack gestures. The main purpose of the study was to examine the predictive role of a cognitive variable, working memory capacity (or "M capacity"), in the acquisition and development of motor skills in a structured sport. Pascual-Leone's theory of constructive operators (TCO) was used as a framework; it defines working memory capacity as the maximum number of schemes that can be simultaneously activated by attentional resources...
November 17, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/29134974/differences-in-physical-physiological-and-motor-performance-traits-between-volleyball-and-basketball-athletes-in-a-university-in-ghana
#11
A Obour, M O Moses, B Baffour-Awuah, B Asamoah, P K Sarpong, F Osei, L G Akwa, E J Appiah
Physical, physiological and motor performance traits play substantial role in both volleyball (VB) and basketball(BB) competitions. The differences in these traits among University athletes in Ghana have not been reported. Hence, thisstudy documents and compares the physical, physiological and motor performance traits of VB and BB university athletes.Purposive sampling technique involving thirty-five university athletes (24 males and 11 females) with mean age of 21.77 ±2.03years was used. Height, weightn, waist and hip circumferences, waist to hip ratio (WHR), body mass index (BMI), heartrate (HR), systolic blood pressure (SBP) and diastolic blood pressure (DBP), shoulder muscular endurance (SME), abdominal muscular endurance (AME), left and right Arm Strength, Leg Power, Reaction time, Agility and Speed traits were measured...
June 30, 2017: Nigerian Journal of Physiological Sciences: Official Publication of the Physiological Society of Nigeria
https://www.readbyqxmd.com/read/29134051/does-context-practice-or-competition-affect-female-athletes-achievement-goal-dominance-goal-pursuit-burnout-and-motivation
#12
Javier Fernández-Rio, Jose A Cecchini, Antonio Méndez-Giménez
The goal of this study was to assess the effects of two different achievement sport contexts, practice and competition, on the motivational profile of professional/semi-professional athletes. Forty-eight Spanish national/international-level female athletes (basketball = 18; handball = 12; soccer = 11; volleyball = 7), mean age 25.14 ± 3.43 years, agreed to participate in the study. They completed a questionnaire, prior and after training and competition, to assess achievement goals, achievement goal dominance, goal pursuit, motivational climate, motivation, burnout and perceived recovery-exertion...
October 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29134048/the-cognitive-and-motivation-intervention-program-in-youth-female-volleyball-players
#13
Fernando Claver, Ruth Jiménez, Alexander Gil-Arias, Alberto Moreno, M Perla Moreno
This study, grounded in Self-Determination Theory (Deci and Ryan, 1985, 2002) was aimed to determine the influence of a cognitive-motivational intervention program, to improve the basic psychological need satisfaction of autonomy and competence, autonomous motivation, procedural knowledge, perceived performance and sport commitment, in youth volleyball players. Participants included 34 Under-19 female volleyball players. A quasi-experimental design was carried out with an experimental group (n = 16; M = 17...
October 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29130715/relationship-of-long-term-macronutrients-intake-on-anabolic-catabolic-hormones-in-female-elite-volleyball-players
#14
Juan Mielgo Ayuso, Michael C Zourdos, Aritz Urdampilleta, Julio Calleja González, Jesús Seco, Alfredo Córdova
INTRODUCTION: Specific macronutrient distribution and training can alter acute and chronic hormone behavior and, subsequently, sport performance. OBJECTIVE: The main aim was to examine relationships between dietary intake and anabolic/catabolic hormone response in elite female volleyball players during a 29-week season. METHODS: Twenty-two elite female volleyballers (26.4 ± 5.6 years; 178 ± 9 cm; 67.1 ± 7.5 kg) had dietary intake (seven-day dietary recall and food frequency questionnaire), blood concentration of anabolic/catabolic hormones concentration, physical performance, and body composition assessed at four time points: a) T1: baseline/pre-testing; b) T2: eleven weeks after T1; c) T3: ten weeks after T2; and d) T4: eight weeks after T3...
October 24, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29095037/the-heat-strain-of-various-athletic-surfaces-a-comparison-between-observed-and-modeled-wet-bulb-globe-temperatures
#15
J Luke Pryor, Riana R Pryor, Andrew Grundstein, Douglas J Casa
CONTEXT:   The National Athletic Trainers' Association recommends using onsite wet-bulb globe temperature (WBGT) measurement to determine whether to modify or cancel physical activity. However, not all practitioners do so and instead they may rely on the National Weather Service (NWS) to monitor weather conditions. OBJECTIVE:   To compare regional NWS WBGT estimates with local athletic-surface readings and compare WBGT measurements among various local athletic surfaces...
November 2, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29091512/knee-frontal-plane-projection-angle-a-comparison-study-between-drop-vertical-jump-and-step-down-tests-with-young-volleyball-athletes
#16
Gabriel Andrade Paz, Marianna de Freitas Maia, Haroldo Gualter Santana, Humberto Miranda, Vicente Lima, John D Willson
STUDY DESIGN: Observational study. CONTEXT: Altered frontal plane knee mechanics during dynamic tasks have been often associated with lower extremity injuries. Strategies to decrease these risk factors and improve knee joint stability are often applied in rehabilitation and training environments. OBJECTIVE: The purpose of this study was to compare knee joint frontal plane projection angles (FPPA) via two dimensional (2D) video analysis during drop vertical jump (DVJ) and step-down test (SDT) tasks in the preferred and non-preferred limbs of young male and female volleyball players...
November 1, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29074476/epidemiology-of-imaging-detected-bone-stress-injuries-in-athletes-participating-in-the-rio-de-janeiro-2016-summer-olympics
#17
Daichi Hayashi, Mohamed Jarraya, Lars Engebretsen, Michel D Crema, Frank W Roemer, Abdalla Skaf, Ali Guermazi
BACKGROUND: Bone stress injuries are common in high-level athletics. AIM: To describe the demographics, frequency and anatomical location of stress injuries (ie, stress reaction and stress fractures) in athletes at the Rio de Janeiro 2016 Summer Olympic Games. METHODS: We recorded all sports injuries at the Rio de Janeiro 2016 Summer Olympics reported by the National Olympic Committee (NOC) medical teams and in the polyclinic and medical venues...
October 26, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29072031/wellness-muscle-soreness-and-neuromuscular-performance-during-a-training-week-in-volleyball-athletes
#18
Francisco Tavares, Mário Simões, Bruno Matos, Tiaki B Smith, Matthew Driller
BACKGROUND: The purpose of the current study is to analyse the acute effects of volleyball training and to compare the responses of different perceptual and neuromuscular measures to overall training load. METHODS: The training load, wellness, neuromuscular performance and perceptual measures of soreness of 13 highly-trained volleyball athletes (18 ± 1 years; 187.1 ± 7.0 cm; 84.3 ± 10.3 kg) representing the Portugal under-19 national team were monitored during a training week...
October 24, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29072028/differences-in-salivary-hormones-and-perception-of-exertion-in-elite-women-and-men-volleyball-players-during-tournament
#19
Luis E Peñailillo, Felipe A Escanilla, Esteban R Jury, Mauricio A Castro-Sepulveda, Louise Deldicque, Hermann P Zbinden-Foncea
Sports tournaments induce both psychological and physiological stress, which seems to be different between men and women. Competition induces anticipatory rises in testosterone and cortisol levels, which may affect performance and physical exertion during tournaments. PURPOSE: The aim of this study was to compare the changes in salivary cortisol and testosterone concentrations between men and women during an official volleyball tournament and to test potential correlations between changes in these hormones and perceived exertion after match...
October 24, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29071115/acceptability-and-perceptions-of-end-users-towards-an-online-sports-health-surveillance-system
#20
Saulo Delfino Barboza, Caroline Silveira Bolling, Joske Nauta, Willem van Mechelen, Evert Verhagen
AIM: To describe the acceptability and the perceptions of athletes and staff members (ie, end-users) towards an online sports-health surveillance system. METHODS: A pilot study with a mixed-methods approach was pursued. Descriptive analysis was conducted to present the adherence of judo (n=34), swimming (n=21) and volleyball (n=14) athletes to an online registration of their sport exposure and any health complaints between April 2014 and January 2015. End-users' perceptions towards the system were investigated qualitatively with semistructured interviews (n=21)...
2017: BMJ Open Sport & Exercise Medicine
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