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Journal of Sports Medicine and Physical Fitness

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https://www.readbyqxmd.com/read/29745219/changes-in-doppler-echocardiography-depending-on-type-of-elite-athletes-immediately-after-maximal-exercise
#1
Saejong Park, Young J Moon, Gi-Byoung Nam, Young-Joo Kim
BACKGROUND: This study explores physiologic differences in the cardiac structure and function of elite athletes during the resting state and immediately after maximum exercise by training type compared to a healthy people of a CG. METHODS: The study focuses on elite middle-long distance group (MLDG), weightlifter group (WG), and a control group (CG). Cardiac structure, systolic function, and diastolic function were measured for all subjects at resting state and immediately after maximum exercise using echocardiography...
May 9, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29745218/functional-movement-screen-scores-in-a-group-of-division-ia-athletes
#2
Joshua M Miller, Kyle J Susa
BACKGROUND: To determine mean values of the Functional Movement Screen scores in Division IA collegiate athletes. METHODS: One hundred sixty-one Division I collegiate athletes were recruited to participate in the study. The Functional Movement Screen was performed during pre- participation screenings prior to the beginning of the season. All athletes performed all seven tests and clearing tests as part of their participation. All the athletes were injury free at the time of testing...
May 9, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29722255/physiological-demands-of-standing-and-wheelchair-fencing-in-able-bodied-fencers
#3
Xavier Iglesias, Ferran A Rodríguez, Rafael Tarragó, Lindsay Bottoms, Lisímaco Vallejo, Lara Rodríguez-Zamora, Michael Price
BACKGROUND: The purpose of this study was to determine the cardiorespiratory demands of standing and wheelchair (seated) fencing in a group of able-bodied fencers during simulated competitive bouts. METHODS: Participants were ten male able-bodied fencers of regional level with previous training experience in wheelchair fencing. After a standardised warm-up participants performed two series of simulated competitive épée bouts (5 and 15 touches) in a random order, either while standing or while sitting in a wheelchair...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29722254/assessing-the-use-of-psychological-skills-by-sports-category-and-the-relation-with-sports-performance-satisfaction
#4
David Tomé-Lourido, Constantino Arce, Ángel Vales-Vázquez, Dolores Ponte
BACKGROUND: The evaluation of psychological skills by athletes and their relationship with sports performance and satisfaction has been of great interest in recent decades. Likewise, there has been an emergent tendency to focus on developing specific psychological skills for each sport. The principal aim of this study was to determine the frequency with which athletes deploy psychological skills whilst competing and whether their frequency varies in accordance with the technical, tactical and physical characteristics of the sport in question...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29722253/running-economy-and-energy-cost-of-running-with-backpacks
#5
Volker Scheer, Leoni Cramer, Hans-Christian Heitkamp
BACKGROUND: Running is a popular recreational activity and additional weight is often carried in backpacks on longer runs. Our aim was to examine running economy and other physiological parameters while running with a 1kg and 3 kg backpack at different submaximal running velocities. METHODS: 10 male recreational runners (age 25 ± 4.2 years, VO2peak 60.5 ± 3.1 ml·kg-1·min-1) performed runs on a motorized treadmill of 5 minutes durations at three different submaximal speeds of 70, 80 and 90% of anaerobic lactate threshold (LT) without additional weight, and carrying a 1kg and 3 kg backpack...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29722252/creatine-monohydrate-supplementation-during-eight-weeks-of-progressive-resistance-training-increases-strength-in-as-little-as-two-weeks-without-reducing-markers-of-muscle-damage
#6
Mojtaba Kaviani, Aboozar Abassi, Philip D Chilibeck
BACKGROUND: Creatine supplementation (Cr) increases strength during resistance training, but the time course of this strength increase is unclear. The aim was to determine the precise time course by which Cr could increase strength and whether Cr prevents muscle damage during eight weeks of resistance training. METHODS: Young males were randomized (double blind) to Cr (n=9, 0.07g/kg/d) and placebo (n=9) during 8-weeks of resistance training (3d/week). Strength was assessed across six exercises every two weeks...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29722251/effects-of-local-versus-remote-ischemic-preconditioning-on-repeated-sprint-running-performance
#7
Patrick J Griffin, Luke Hughes, Conor Gissane, Stephen D Patterson
BACKGROUND: The aim of this study was to compare the effect of local and remote ischemic preconditioning (IPC) on repeated sprint exercise. METHODS: Twelve males (age 22 ± 2 years; stature 1.79±0.07 m; body mass 77.8±8.4 kg; mean ± SD) completed four trials consisting of remote (arm) and local (leg) IPC and SHAM interventions prior to repeated sprint exercise (3 x (6 x 15 + 15-m) shuttle sprints), in a double-blind, randomised, crossover designed study. These tests were immediately preceded by IPC (4 x 5 minute intervals at 220 mmHg bilateral occlusion) or SHAM treatment (4 x 5 minute intervals at 20 mmHg bilateral occlusion)...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29722250/the-effects-of-8-weeks-of-two-different-training-methods-on-on-sight-lead-climbing-performance
#8
Marc Philippe, Ingo Filzwieser, Veronika Leichtfried, Cornelia Blank, Simon Haslinger, Johannes Fleckenstein, Wolfgang Schobersberger
BACKGROUND: Despite climbing being an increasingly popular sporting pursuit, there have been very few scientific evaluations of appropriate training methods for competitive climbers. The aim of this study was to investigate the effects of an 8-week climbing-specific muscular hypertrophy (MH) or muscular endurance (ME) resistance training program on the on-sight lead climbing performance in a similar setting to a world cup. METHODS: Twenty-three elite male and female climbers (age: 25...
May 2, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29697215/variability-of-activity-profile-during-medium-sided-games-in-professional-soccer
#9
Vincenzo Rago, João R Silva, Magni Mohr, Daniel Barreira, Peter Krustrup, António N Rebelo
BACKGROUND: In Southern European countries it is very frequent to perform medium-sized games (MSG) as last training drill. We analyzed the individual variability and changes in activity patterns during MSG throughout the preseason. METHODS: Activity profile during MSGs (10v10+goalkeepers, duration: 10-min, field length: 50 m, width: 90 m, area per player: 204.5 m2) was quantified using a GPS in 14 professional male players (6 defenders, 5 midfielders 5 and attackers)...
April 24, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29687691/side-effects-of-anabolic-steroids-used-by-athletes-at-unaizah-gyms-saudi-arabia-a-pilot-study
#10
Amer A Almaiman, Sulaiman H Almaiman, Elsayed I Elagamy, Osama Al Wutayd, Mohammed Almarzuqi, Rayyan Alzunaidi, Sami Alhatlani, Eltayeb E Eid
BACKGROUND: A large number of Saudi athletes are recently shown to use androgenic anabolic steroid (AAS) products to achieve rapid muscle growth without realizing the serious health risks of these drugs. Aim of this study was to elucidate the side effects encountered with prolonged use of AAS products by Saudi athletes. METHODS: A cross-sectional study was conducted, in which 16 regular gym members, 12 of them used AAS, were asked to answer a questionnaire and provide blood samples following current AAS course completion...
April 20, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29687690/anthropometric-characteristics-of-top-class-olympic-race-walkers
#11
Josu Gomez-Ezeiza, Nicholas Tam, Jon Torres-Unda, Cristina Granados, Jordan Santos-Concejero
BACKGROUND: Typical training programmes in elite race walkers involve high training volumes at low and moderate intensities, which have been reported to induce functional and structural adaptations at an anthropometric level. Since anthropometrical variables are closely related to movement efficiency and performance in endurance events, the aim of this study was to describe the anthropometric profile of world-class race walkers. METHODS: Twenty-nine world-class race walkers (21 men & 8 women) participated in this study...
April 20, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29687689/acute-effect-of-different-exercise-intensities-and-differences-related-to-age-on-muscle-performance-in-young-and-older-women
#12
José C Jambassi-Filho, André L Gurjão, Marilia Ceccato, Antonio G Santos-Neto, Igor A Braz, Sebastião Gobbi
BACKGROUND: The aim of this study was to compare the acute effect of different exercise intensities on the number of repetitions and total volume and differences related to age on the fatigue index. METHODS: Twelve young women (19.0 ± 1.6 years) and ten older women (66.6 ± 5.8 years) performed two experimental sessions for the elbow flexor muscles in a balanced cross-over design. In one experimental session, the participants performed three sets to concentric muscle failure at 100% of 10-12 maximum repetitions (RM)...
April 20, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29687688/impact-kinetics-associated-with-four-common-bilateral-plyometric-exercises
#13
Ethan Stewart, Thomas Kernozek, Hsien-Te Peng, Brian Wallace
BACKGROUND: This study quantified the peak vertical ground reaction force (VGRF), impulse, and average and instantaneous loading rates developed during bilateral plyometric exercises. METHODS: Fourteen collegiate male athletes performed four different bilateral plyometric exercises within a single testing session. Depth jumps from thirty, sixty and ninety centimeter heights (DJ30, DJ60, and DJ90, respectively), and a two consecutive jump exercise (2CJ), were randomly performed...
April 20, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29687687/body-composition-and-somatotypes-of-male-zimbabwean-premier-league-football-referees
#14
Morris Banda, Heinrich W Grobbelaar, Elmarie Terblanche
BACKGROUND: Elite athletes need to optimise their body composition to deliver world class performances and this argument could be extended to elite referees as well. Unfortunately, there is a scarcity of body composition information among football referees. AIM: The aim of the study was to determine and compare the body composition and somatotypes of male football referees and assistant referees who officiated in the 2013 Zimbabwe Premier Football League. METHODS: Forty-one participants (21 referees, 20 assistant referees; 8 FIFA, 33 ZIFA licenced referees) with a mean age of 34...
April 20, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29619806/the-influence-of-single-leg-landing-direction-on-lower-limbs-biomechanics
#15
Antonio Dello Iacono, Moshe Ayalon, Weijie Wang
BACKGROUND: The purpose of this study was to investigate whether different directions of single-leg landing tasks would influence lower limbs joints biomechanics. METHODS: Using a controlled and experimental design, thirty physically active male subjects (age: 26.4 ± 4.4 years; height: 180.5 ± 3.7 cm; weight: 79.8: ± 4.4 kg), by dropping down from the top of a wooden box of 31 cm height, performed three one-leg landing tasks featured by different landing directions: frontward (FL), lateral (LL), and rotational (RL)...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29619805/using-blood-lactate-concentration-to-predict-muscle-damage-and-jump-performance-response-to-maximal-stretch-shortening-cycle-exercise
#16
Vladimir Manojlović, Frane Erčulj
BACKGROUND: It is well known that eccentric muscle contractions induce delayed onset muscle soreness (DOMS) and exertional rhabdomyolysis (ERB), both of which are related to high blood levels of muscle damage markers after exercise. Creatine kinase (CK) is, together with some other markers (e.i. myoglobin, α-actin, skeletal troponin), widely used in determination of muscle damage. Moreover, DOMS after eccentric exercise has been shown to be associated with altered blood lactate concentration after subsequent submaximal or maximal cycling exercise...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29619804/effect-of-voluntary-teeth-clenching-and-sitting-posture-on-maximal-static-force-of-limb-muscles
#17
Ahmad H Alghadir, Hamayun Zafar, Zaheen A Iqbal, Einas S Al-Eisa
BACKGROUND: People clench their teeth to activate facial, neck and abdominal muscles when they need to generate heavy muscle force against large resistance like lifting heavy objects, in order to gain possible ergogenic advantage. These are termed as remote voluntary contractions. Aim of this study was to evaluate the effect of voluntary teeth clenching on maximal voluntary contraction of extensors and flexors of the knee, shoulder and elbow joints of the dominant side during slouch and unsupported upright sitting...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29619803/measuring-the-validity-and-reliability-of-the-apple-watch-as-a-physical-activity-monitor
#18
Peng Zhang, Steven D Godin, Matthew V Owens
BACKGROUND: This study aimed to investigate the validity and reliability of the energy expenditure (EE) estimation of Apple Watch among college students. METHODS: Thirty college students completed two sets of three 10-minute treadmill walking and running trials while wearing three Apple Watches and being connected to indirect calorimetry. The walking trials were at speeds of 54, 80, and 107 m•min-1 while the running trials were at 134, 161, 188m•min-1. Energy expenditure comparisons were made using Two-way ANOVA with repeatedmeasures...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29619802/improving-muscular-strength-and-hypertrophy-are-we-following-the-right-scientific-way
#19
Marcos D Polito
No abstract text is available yet for this article.
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29619801/evaluation-of-somatotype-in-artistic-gymnastics-competitors-a-meta-analytical-approach
#20
Katarzyna Sterkowicz-Przybycien, Emanuela Gualdi-Russo
INTRODUCTION: Studies on the anthropometric characteristics of athletes have a long history, but there are no published reviews on the somatotype of artistic gymnasts. Practitioners and professional coaches can gain guidance from improved understanding of the ideal body constitution and the impact of high-intensity training since preadolescence on body build. The present review is designed to provide this information. EVIDENCE ACQUISITION: Academic Search Complete, SPORTDiscus, Medline, Google Scholar, and ResearchGate were searched in January 2017...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
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