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Journal of Sports Medicine and Physical Fitness

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https://www.readbyqxmd.com/read/28677946/effects-of-probiotics-supplementation-and-circuit-training-on-immune-responses-among-sedentary-young-males
#1
Nur S Ibrahim, Foong K Ooi, Chee K Chen, Ayu S Muhamad
BACKGROUND: Growing evidence suggests that probiotics may have positive benefits on immune responses following endurance exercise. However, little attention has been given to its possible beneficial effects on immune responses following resistance exercise. METHODS: Forty-one healthy sedentary males were recruited and randomised into four groups: sedentary control with placebo (C), probiotics (P), circuit training with placebo (Ex), and circuit training with probiotics (PEx) groups...
July 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28677945/within-person-relationship-between-self-efficacy-and-performance-across-trials-effect-of-task-objective-and-task-type
#2
Teri J Hepler, Jason Ritchie, Christopher R Hill
BACKGROUND: Self-efficacy has been shown to be a consistent, positive predictor of between-persons performance in sport. However, there have been equivocal results regarding the influence of self-efficacy on a person's performance over time. This study investigated the influence of self-efficacy on motor skill performance across trials with respect to two different task objectives and task types. METHODS: Participants (N=84) performed 4 blocks of 10 trials of a dart throwing (closed skill) and a hitting (open skill) task under 2 different task objectives: competitive and goal-striving...
July 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28677944/heart-rate-response-and-recovery-in-wheelchair-tetraplegic-rugby-athletes-a-pilot-study
#3
Michelle C Coutinho, Patrícia S Vigário, Agnaldo J Lopes, Fernando S Guimarães
BACKGROUND: Subjects with spinal cord injuries (SCI) have impaired autonomic cardiac regulation and increased risk of cardiovascular disease. In face of the insufficient research data on the autonomic control of physically active subjects with SCI, this study aimed at describing the chronotropic response, as well as the heart rate recovery behaviour of a cohort of elite wheelchair rugby athletes. METHODS: This is a cross-sectional study including a convenience sample of 17 elite wheelchair rugby athletes with tetraplegia...
July 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28677943/achieving-grand-tour-success-a-pilot-study-using-cycling-s-world-tour-points
#4
Luca Filipas, Antonio LA Torre, Paolo Menaspà, Hedda Giorgi
BACKGROUND: In cycling, the Union Cycliste International (UCI) World Tour points system provides a basis to assess the development of riders by longitudinally monitoring accumulated points. The main aim of the present analysis was to compare the annual aggregation of points of Grand Tours (GT) contenders during the years before and the year after achieving an overall top-ten (T10) placing in a GT for the first time. METHODS: Data from professional cyclists who achieved their first T10 GC result in a GT between 2010 and 2015, inclusive, were included in the analysis...
July 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28677942/effect-of-fibular-repositioning-taping-in-adult-basketball-players-with-chronic-ankle-instability-a-randomized-placebo-controlled-crossover-trial
#5
Yanina Alves, Fernando Ribeiro, Anabela G Silva
BACKGROUND: Chronic ankle instability presents a high incidence and prevalence in basketbal players. It's important to develop strategies to reduce the functional and mechanical limitations resulting from this condition. To compare the effect of Mulligan ́s fibular repositioning taping with a placebo taping immediatly after application and after a running test (Yo-Yo IRT). METHODS: 16 adult basketball players (10 male, 6 female) with chronic ankle instability and mean age 21...
July 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28677941/cardiorespiratory-responses-during-aquatic-treadmill-exercise-and-land-treadmill-exercise-in-older-adults-with-type-2-diabetes
#6
Brandon R Rigby, Janie Bolte, Kyle D Biggerstaff, David L Nichols, Todd J Castleberry
BACKGROUND: The purpose of this study was to compare the effect of aquatic treadmill exercise (ATM) to land treadmill exercise (LTM) in adults with and without type 2 diabetes (T2D). METHODS: Five participants with T2D (4 females, 1 male; age = 51±3 years; height = 170±3 cm; weight = 96±11 kg; body fat = 32±1%) and five participants without T2D (4 females, 1 male; age = 51±3 years; height = 170±3 cm; weight = 71±15 kg; body fat = 27±2%) completed the study...
July 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28677940/effect-of-shoulder-position-on-triceps-brachii-heads-activity-in-dumbbell-elbow-extension-exercises
#7
Daniel de Souza Alves, Thiago T da Matta, Liliam F de Oliveira
BACKGROUND: Elbow extension exercises in different shoulder positions are selected to raise distinct effort levels among the triceps brachii heads. Because there are several triceps exercises, its choice is a big challenge on resistance training prescription. The present study aimed to compare the electromyographic signal of triceps brachii long and lateral heads among three different elbow ranges of motion (ROM) during two commonly prescribed elbow extension exercises: overhead dumbbell elbow extension (OD) and lying dumbbell elbow extension (LD)...
July 5, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639445/periodized-training-archive-better-autonomic-modulation-and-aerobic-performance-than-non-periodized-training
#8
Vicente J Clemente-Suarez
BACKGROUND: The aim of the present research was to analyze autonomic response and aerobic performance after performing three different workloads training distributions. METHODS: Thirty athletes (38.7±9.8 years. 174.7±6.5 cm. 72.0±9.8 kg) were randomly divided in 3 groups of 10 participants each one to perform 3 different 4-week training programs: PRO group: increasing the aerobic training intensity during the 4-weeks; UNI group: performing a uniform aerobic intensity every week; and FRE group performing a free training...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639444/comparison-of-shuttle-and-straight-repeated-sprint-ability-tests-and-their-relationship-to-anthropometrics-and-explosive-muscular-performance-of-lower-limb-in-elite-handball-players
#9
Souhail Hermassi, René Schwesig, Rainer Wollny, Georg Fieseler, Roland van den Tillaar, Jaime Fernandez-Fernandez, Roy J Shephard, Mohamed S Chelly
BACKGROUND: This study assessed inter-relationships between shuttle and straight repeated-sprint ability tests and the relationship of each measure to anthropometric and explosive lower limb performance data in elite handball players. METHODS: Twenty-two elite male handball players (18.9 ± 0.2 years; body mass: 83.3 ± 1.1 kg, height: 1.79 ± 2.30 m, body fat: 12.8 ± 0.2%) completed tests that included a lower limb force-velocity test of peak power (Wpeak), jumping ability (squat and counter-movement jumps; SJ, CMJ), 1 repetition maximum (1-RM) half back squat, average sprint velocity over 5 m (V-5 m), peak velocity between 25-30 m (Vmax), and Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1), and anthropometric determinations of cross-sectional areas and muscle volumes for leg and thigh muscles...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639443/relationship-between-the-handball-specific-complex-test-nonspecific-field-tests-and-the-match-performance-score-in-elite-professional-handball-players
#10
Souhail Hermassi, Mohamed S Chelly, Rainer Wollny, Birgit Hoffmeyer, Georg Fieseler, Stephan Schulze, Lars Irlenbusch, Karl-Stefan Delank, Roy J Shephard, Thomas Bartels, René Schwesig
BACKGROUND: This study assessed the validity of the handball-specific complex-test (HBCT) and two nonspecific field tests in professional elite handball athletes, using the match performance score (MPS) as the gold standard of performance. METHODS: Thirteen elite male handball players (age: 27.4 ± 4.8 years; premier German league) performed the HBCT, the Yo-Yo Intermittent Recovery Test (Yo-Yo-IR1-test) and a repeated shuttle sprint ability (RSA) test at the beginning of pre-season training...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639442/weightbearing-ankle-dorsiflexion-range-of-motion-and-sagittal-plane-kinematics-during-single-leg-drop-jump-landing-in-healthy-male-athletes
#11
Brittany Dowling, April L McPherson, James M Paci
BACKGROUND: Passive ankle dorsiflexion range of motion (DROM) measures have been identified as a risk factor for injury during landings. However, passive measurements might not be indicative of dynamic ankle movement, whereas a weightbearing ROM might be a better tool when evaluating movement. The purpose of this study was to investigate the relationship between weightbearing DROM and sagittal plane landing mechanics in a single leg drop jump task. METHODS: 73 male athletes (22...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639441/effect-of-periodized-high-intensity-interval-training-hiit-on-body-composition-and-attitudes-towards-hunger-in-active-men-and-women
#12
Todd A Astorino, Brendyn Heath, Jason Bandong, Gina M Ordille, Ramon Contreras, Matthew Montell, Matthew M Schubert
BACKGROUND: High intensity interval training (HIIT) increases maximal oxygen uptake similar to aerobic exercise. However, changes in body composition are equivocal in response to HIIT. AIM: We examined changes in body composition and dietary restraint in response to 20 sessions of HIIT varying in structure. METHODS: Thirty nine active men and women (age and VO2max = 22.5 ± 4.4 yr and 40.1 ± 5.6 mL/kg/min) were randomized to one of three periodized HIIT regimes performed on a cycle ergometer...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639440/the-relationship-between-jumping-performance-isokinetic-strength-and-dynamic-postural-control-in-elite-youth-soccer-players
#13
Robert Śliwowski, Monika Grygorowicz, Andrzej Wieczorek, Łukasz Jadczak
BACKGROUND: The aim of this study was (i) to investigate the relationship between vertical jumping performance, isokinetic strength of knee extensors/flexors, and postural priority and (ii) an attempt to describe a multiple regression model that accounts for the effects of selected parameters of isokinetic strength and postural priority on vertical jumping performance. METHODS: Thirty-one professional male soccer players, aged from 17 to 20 years, participated in this study (mean age: ± SD 18,6 ± 1...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639439/somatic-characteristics-and-motor-fitness-of-elite-and-sub-elite-polish-male-badminton-players
#14
Paweł Tomaszewski, Anna Kęska, Joanna Tkaczyk, Dariusz Nowicki, Edyta Sienkiewicz-Dianzenza
BACKGROUND: An appropriate level of somatic and fitness traits is believed to contribute to success in an international badminton competitions however, these have not been sufficiently explored in elite Polish badminton players. Therefore, the aim of the study was to assess somatic build and physical fitness of elite and sub-elite Polish badminton players and to identify key traits that determine achieving sporting success in badminton. METHODS: The study participants comprised 20 men from the Polish Badminton National Teams A (elite; n = 9) and B (sub-elite; n = 11)...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28639438/body-composition-analysis-to-study-long-term-training-effects-in-elite-male-water-polo-athletes
#15
Giovanni Melchiorri, Valerio Viero, Roberto Sorge, Tamara Triossi, Alessandro Campagna, Stella L Volpe, Dalgisio Lecis, Virginia Tancredi, Angela Andreoli
BACKGROUND: Elite water polo athletes undergo heavy training programs throughout the year, but especially to prepare major competitions, such as the Olympics. Optimal athletic performance is a result of many factors, including proper management of the intensity and volume of training, nutrition and recovery between training sessions. When training is excessive in relation to recovery may occur non functional overreaching (NFO). NFO can degenerate into overtraining syndrome (OTS) resulting in a decrease in athletic performance, with likely changes in body weight and body composition...
June 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28597622/the-effect-of-training-load-on-neuromuscular-performance-muscle-soreness-and-wellness-during-an-in-season-non-competitive-week-in-elite-rugby-athletes
#16
Francisco Tavares, Phil Healey, Tiaki B Smith, Matthew Driller
BACKGROUND: In the elite Rugby setting, it is critical to understand the effects of training load on the levels of fatigue, soreness and readiness of the athletes. METHODS: The training load, wellness, neuromuscular markers of fatigue and various perceptual measures of soreness of 16 elite Rugby athletes were monitored during a training week. Training load was obtained for field training sessions, extra conditioning and gym-based sessions. Perceptual fatigue was obtained every morning from a 5-item wellness questionnaire and a questionnaire on the muscle soreness of 9 different muscle sites from each side of the body...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28597621/hemodynamic-adaptation-to-training-in-visually-impaired-professional-tandem-cyclists
#17
Anna M Kamelska, Krzysztof L Mazurek, Jacek J Nowakowski
BACKGROUND: Cycling is one of the disciplines with the greatest training-induced volumetric changes in cardiovascular systems. The aim of the study was to evaluate the hemodynamic adaptation to 7-month routine training in athletes with and without severe visual impairment. METHODS: The study involved 26 men: visually impaired (VI) (n = 13; 37±12.2 years) and properly sighted (PS) (n = 13; 41±12.8 years) elite tandem-cycling athletes. They underwent hemodynamic variables monitoring at rest and during exercise test by impedance cardiography (ICG), before (in the middle of the transition period) and after 7-month cycling training (at the beginning of the competitive period)...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28597620/critical-velocity-in-swimmers-of-different-ages
#18
Alex Rizzato, Giuseppe Marcolin, Alessandro Rubini, Nicola Olivato, Simone Fava, Antonio Paoli, Gerardo Bosco
BACKGROUND: In swimming one of the most employed training speed among coaches is the non-invasive Theoretical Critical Velocity (TCV) defined as the velocity that can be maintained continuously without exhaustion. METHODS: We calculated the 4mmol/L lactate Critical Velocity (MCV) in a group of swimmers of different ages (Young, Elite and Master), and compared results to the predicted TCV defined starting from the 200 and 400 m freestyle best seasonal performances...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28597619/gender-related-cardiac-dimension-differences-between-female-and-male-professional-soccer-players
#19
André Sansonio de Morais, Guilherme Assunção Ferreira, Adriano E Lima-Silva, Ary Gomes Filho
BACKGROUND: The aim of this study was to determine if cardiac hypertrophy differs between professional female and male soccer players. METHODS: Twenty-two female and 20 male professional soccer players, and their respective non-athlete controls (22 females and 19 males) were submitted to an echocardiogram. RESULTS: Females had a shorter left ventricular intracavitary diameter and wall thicknesses than males in both groups. However, these differences disappeared when cardiac dimensions were expressed relative to body mass area (p > 0...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28597618/effects-of-resistance-training-overtraining-and-early-specialization-on-youth-athletes
#20
Benjamin K Walters, Connor R Read, A Reed Estes
INTRODUCTION: In 2014, 60 million youth ages 6-18 participated in some form of generalized athletics. 3.5 million children are injured annually participating in organized sport or recreational activities. While sound physical education can decrease the burden of youth sports injuries, the median annual physical education budget of $764 for United States elementary, middle and high schools may not allow enough flexibility to apply evidenced-based guidelines. EVIDENCE ACQUISITION: The topics were selected after a careful review of the 2016 National Strength and Conditioning Association Position Statement on Long-Term Athletic Development...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
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