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International Journal of Sports Physiology and Performance

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https://www.readbyqxmd.com/read/29182457/a-comparison-of-the-isometric-mid-thigh-pull-and-isometric-squat-intraday-reliability-usefulness-and-the-magnitude-of-difference-between-tests
#1
Claire J Brady, Andrew J Harrison, Eamonn P Flanagan, G Gregory Haff, Thomas M Comyns
PURPOSE: This investigation examined the reliability and usefulness of the isometric mid-thigh pull (IMTP) and isometric squat (ISqT) performed at the same knee and hip angles. The scores produced in each test were compared to determine the magnitude of differences between tests. METHODS: Twenty six male and female athletes (23.6±4.3 y; 1.75±0.07 m; 68.8±9.7 kg) performed 2 maximal repetitions of the IMTP and ISqT following a specific warm up. RESULTS: Maximum force, absolute peak force (PF), relative PF, allometrically scaled PF, rate of force development (RFD) (0 - 200 and 0 - 250 ms) and impulse (0 - 300 ms) were deemed reliable (ICC ≥ 0...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182436/vertical-and-horizontal-jump-capacity-in-international-cerebral-palsy-football-players
#2
Raul Reina, Aitor Iturricastillo, Rafael Sabido, Maria Campayo-Piernas, Javier Yanci
PURPOSE: the aims of the present study were to evaluate the reliability and validity of vertical and horizontal jump tests in football players with cerebral palsy (FPCP), and to analyze the jump performance differences between current IFCPF functional classes (i.e. FT5-FT8). METHODS: One hundred and thirty-two international para-footballers (25.8 ± 6.7 years; 70.0 ± 9.1 kg; 175.7 ± 7.3 cm; 22.8 ± 2.8 kg·m-2; 10.7 ± 7.5 years training experience) participated in the study...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182434/reactive-strength-index-a-poor-indicator-of-reactive-strength
#3
Robin Healy, Ian Kenny, Drew Harrison
PURPOSE: The primary aim was to assess the relationships between reactive strength measures and associated kinematic and kinetic performance variables achieved during drop jumps. A secondary aim was to highlight issues with the use of reactive strength measures as performance indicators. METHODS: Twenty eight national and international level sprinters, consisting of fourteen men and women, participated in this cross-sectional analysis. Athletes performed drop jumps from a 0...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182431/impact-induced-muscle-damage-and-contact-sport-aetiology-effects-on-neuromuscular-function-and-recovery-and-the-modulating-effects-of-adaptation-and-recovery-strategies
#4
Mitchell Naughton, Joanna Miller, Gary J Slater
Athletes involved in contact-sports are habitually exposed to skeletal muscle damage as part of their training and performance environments. This often leads to exercise-induced muscle damage (EIMD) resulting from repeated eccentric and/or high-intensity exercise, and impact-induced muscle damage (IIMD) resulting from collisions with opponents and the playing surface. Whilst EIMD has been an area of extensive investigation, IIMD has received comparatively little research, with the magnitude and timeframe of alterations following IIMD not presently well understood...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182422/salivary-biomarkers-and-training-load-during-training-and-competition-in-paralympic-swimmers
#5
Ciara Sinnott-O'Connor, Tom Comyns, Alan M Nevill, Giles Warrington
PURPOSE: Stress responses in athletes can be attributed to training and also competition, where increased physiological and psychological stress may negatively impact on performance and recovery. The aim of this study was to examine the relationship between training load and salivary biomarkers IgA, alpha-amylase (AA) and cortisol across a 16-week preparation phase and 10-day competition phase in Paralympic swimmers. METHODS: Four Paralympic swimmers provided bi-weekly saliva samples during three training phases - 1) normal training, 2) intensified training and 3) taper as well as daily saliva samples in the 10 day Paralympic competition (2016 Paralympic Games)...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182417/seasonal-training-load-and-wellness-monitoring-in-a-professional-soccer-goalkeeper
#6
James J Malone, Arne Jaspers, Werner F Helsen, Brenda Merks, Wouter Gp Frencken, Michel S Brink
The purpose of this investigation was to: (a) quantify the training load practices of a professional soccer GK, and (b) investigate the relationship between the training load observed and the subsequent self-reported wellness response. One male goalkeeper playing for a team in the top league of the Netherlands participated in this case study. Training load data were collected across a full season using a global positioning system (GPS) device and session rating of perceived exertion (session-RPE). Data was assessed in relation to the number of days to a match (MD- and MD+)...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182415/validity-and-reliability-of-the-cycleops-hammer-cycle-ergometer
#7
José R Lillo-Bevia, Jesús G Pallarés
PURPOSE: To validate the new drive indoor trainer Hammer designed by Cycleops®. METHODS: Eleven cyclists performed 44 randomized and counterbalanced graded exercise tests (100-500W), at 70, 85 and 100 rev.min-1 cadences, in seated and standing positions, on 3 different Hammer units, while a scientific SRM system continuously recorded cadence and power output data. RESULTS: No significant differences were detected between the three Hammer devices and the SRM for any workload, cadence, or pedalling condition (P value between 1...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182414/cfdna-as-an-earlier-predictor-of-exercise-induced-performance-decrement-related-to-muscle-damage
#8
Michely V Andreatta, Victor M Curty, João Victor S Coutinho, Miguel Ângelo A Santos, Paula F Vassallo, Nuno F de Sousa, Valério G Barauna
PURPOSE: The aims of this study were: a) to evaluate whether cell-free DNA (cfDNA) levels increase immediately after an acute light and heavy resistance exercise (RE) bout, and b) to whether cfDNA levels are associated with functional muscle capacity until 48hrs after exercise session. METHODS: Twenty healthy volunteers performed 3 sets of the leg press resistance exercise with 80% of 1RM (RE80) or 40% of 1RM (RE40) with similar exercise volume. Blood lactate was measured after completion of the 3 sets...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182413/energetic-profile-of-the-basketball-exercise-simulation-test-in-junior-elite-players
#9
Richard Latzel, Olaf Hoos, Sebastian Stier, Sebastian Kaufmann, Volker Fresz, Dominik Reim, Ralph Beneke
PURPOSE: To analyze the energetic profile of the basketball exercise simulation test (BEST). METHODS: 10 male elite junior basketball players (age: 15.5±0.6yrs, height: 180±9cm, body mass: 66.1±11.2kg) performed a modified BEST (20 circuits consisting of jumping, sprinting, jogging, shuffling, and short breaks) simulating professional basketball game play. Circuit time, sprint time, sprint decrement, oxygen uptake (VO2), heart rate (HR), and blood lactate concentration (BLC) were obtained...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182410/the-effect-of-periodisation-and-training-intensity-distribution-on-middle-and-long-distance-running-performance-a-systematic-review
#10
Mark Kenneally, Arturo Casado, Jordan Santos-Concejero
This review aimed to examine the current evidence for three primary training intensity distribution types; 1) Pyramidal Training, 2) Polarised Training and 3) Threshold Training. Where possible, we calculated training intensity zones relative to the goal race pace, rather than physiological or subjective variables. We searched 3 electronic databases in May 2017 (PubMed, Scopus, and Web of Science) for original research articles. After analysing 493 resultant original articles, studies were included if they met the following criteria: a) participants were middle- or long-distance runners; b) studies analysed training intensity distribution in the form of observational reports, case studies or interventions; c) studies were published in peer-reviewed journals and d) studies analysed training programs with a duration of 4 weeks or longer...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29182408/rapid-weight-loss-is-not-associated-with-competitive-success-in-elite-youth-olympic-style-boxers-in-europe
#11
Damir Zubac, Hrvoje Karnincic, Damir Sekulic
PURPOSE: The aim of this study was to examine the influence of rapid weight loss (RWL) on competitive success in elite youth Olympic-style boxers. In addition, this study examined the practice and prevalence of weight reduction, weight management protocols and related symptoms in youth boxers from twelve European countries (n=83; all males; 17.1±0.9 y). METHODS: The data were collected using an extensive questionnaire on weight cutting and its associated protocols and symptoms prior to highest-level continental championships...
November 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29140179/relationship-between-two-standardized-tackling-proficiency-tests-and-rugby-league-match-play-tackle-performance
#12
Michael Speranza, Tim Gabbett, David A Greene, Richard D Johnston, Andrew D Townshend
This study investigated the relationship between two different assessments of tackling ability, physical qualities, and match-play performance in semi-professional rugby league players. Eighteen semi-professional rugby league players (mean ± SD age, 23.1 ± 2.0 yrs; mass 98.8 ± 11.8 kg) underwent tests of upper- and lower-body strength and power. Tackling ability was assessed using video analysis under-the-ball and over-the-ball tackle drills. A total of 2,360 tackles were analyzed from match-play. Over-the-ball tackle ability was positively related to the proportion of dominant tackles (rs = 0...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29140152/trend-analysis-of-20-years-of-fim-road-racing-grand-prix-motorcycle-world-championship
#13
Emanuele D'Artibale, Maheswaran Rohan, John B Cronin
BACKGROUND/AIM: The technological advancements in motorcycle road racing have ensured the evolution of motorcycle performance, however, it is unknown whether these advancements have resulted in increased speed and therefore risk. To better understand the top level of this sport and inform future regulations, performance-related strategies and safety procedures, this study aims at: 1) analysing and describing how the performance characteristics of the top-class of the FIM Grand Prix motorcycle world championship have changed with time; and, 2) quantifying potential interactions between performance data (i...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29140148/the-reliability-of-individualized-load-velocity-profiles
#14
Harry G Banyard, K Nosaka, Alex D Vernon, G Gregory Haff
PURPOSE: This study examined the reliability of peak velocity (PV), mean propulsive velocity (MPV), and mean velocity (MV) in the development of load-velocity profiles (LVP) in the full depth free-weight back squat performed with maximal concentric effort. METHODS: Eighteen resistance-trained men performed a baseline one-repetition maximum (1RM) back squat trial and three subsequent 1RM trials used for reliability analyses, with 48-hours interval between trials...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29140147/sprint-running-performance-and-technique-changes-in-athletes-during-periodized-training-an-elite-training-group-case-study
#15
Ian N Bezodis, David G Kerwin, Stephen-Mark Cooper, Aki I T Salo
PURPOSE: To understand how training periodization influences sprint performance and key step characteristics over an extended training period in an elite sprint training group. METHODS: Four sprinters were studied during five months of training. Step velocities, step lengths and step frequencies were measured from video of the maximum velocity phase of training sprints. Bootstrapped mean values were calculated for each athlete for each session and 139 within-athlete, between-session comparisons were made with a repeated measures ANOVA...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29140145/monitoring-rugby-players-for-fitness-and-fatigue-what-do-coaches-want
#16
Lindsay T Starling, Michael I Lambert
PURPOSE: The advantages of monitoring players in a team are well documented. However, barriers associated with lack of resources and time prevents teams from implementing systematic monitoring programs. This study aims to identify 1) the methods rugby teams use to monitor the training load and associated response to the training load, and 2) prerequisites of a monitoring protocol that are scientifically suitable and practically applicable for monitoring fitness and fatigue of rugby players...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29140142/coffee-ingestion-enhances-one-mile-running-race-performance
#17
Neil D Clarke, Darren L Richardson, James Thie, Richard Taylor
PURPOSE: Caffeine, often in the form of coffee, is frequently supplemented by athletes in an attempt to facilitate improved performance during exercise. The aim of the present study was to investigate the effectiveness of coffee ingestion as an ergogenic aid prior to a one-mile (1609 m) race. METHODS: In a double-blind, randomised, crossover, placebo-controlled design 13 trained male runners completed a one-mile race 60 minutes following the ingestion of 0.09 g·kg(-1) coffee (COF), 0...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29140137/v%C3%AC-o2-and-muscle-deoxygenation-kinetics-during-skating-comparison-between-slide-board-and-treadmill-skating
#18
Tatiane Piucco, Rogério Soares, Fernando Diefenthaeler, Guillaume Millet, Juan Murias
PURPOSE: this study aimed to compare the oxygen uptake (V̇O2) kinetics during skating on a treadmill and skating on a slide board and discuss potential mechanisms that might control the V̇O2 kinetics responses during skating. METHODS: breath-by-breath pulmonary V̇O2 and near-infrared spectroscopy-derived muscle deoxygenation ([HHbMb]) were monitored continuously in 12 well-trained young long track speed skaters. On-transient V̇O2 and [HHbMb] responses to skating on a treadmill and skating on a slide board at 80% of the estimated gas exchange threshold were fitted as mono-exponential function...
November 15, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29091467/the-future-of-classification-in-wheelchair-sports-can-data-science-and-technological-advancement-offer-an-alternative-point-of-view
#19
Rienk M A van der Slikke, Daan J J Bregman, Monique A M Berger, Annemarie M H de Witte, Dirk-Jan H E J Veeger
PURPOSE: Classification is a defining factor for competition in wheelchair sports, but it is a delicate and time-consuming process with often questionable validity.(1) New inertial sensor based measurement methods applied in match play and field tests, allow for more precise and objective estimates of the impairment effect on wheelchair mobility performance. It was evaluated if these measures could offer an alternative point of view for classification. METHODS: Six standard wheelchair mobility performance outcomes of different classification groups were measured in match play (n=29), as well as best possible performance in a field test (n=47)...
November 1, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29091465/validity-of-the-online-athlete-management-system-to-assess-training-load
#20
Miranda J Menaspà, Paolo Menaspà, Sally A Clark, Maurizio Fanchini
PURPOSE: The aim of this study was to validate the quantification of training load (s-RPE) in an Australian Olympic squad (women's water polo), assessed with the use of a modified RPE scale collected via a newly developed online system (Athlete Management System, AMS). METHODS: Sixteen elite women water polo players (age 26 ± 3 y, height 1.78 ± 0.05 m, body mass 75.5 ± 7.1 kg) participated in the study. Thirty training sessions were monitored, for a total of 303 individual sessions...
November 1, 2017: International Journal of Sports Physiology and Performance
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