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International Journal of Sports Physiology and Performance

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https://www.readbyqxmd.com/read/29436926/winter-olympic-games-a-lens-on-the-good-and-bad-in-top-sport
#1
Ralph Beneke
No abstract text is available yet for this article.
February 13, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29431595/wheelchair-mobility-performance-enhancement-by-changing-wheelchair-properties-what-is-the-effect-of-grip-seat-height-and-mass
#2
Rienk M A van der Slikke, Annemarie M H de Witte, Monique A M Berger, Daan J J Bregman, Dirk Jan H E J Veeger
PURPOSE: The purpose of this study was to provide insight in the effect of wheelchair settings on wheelchair mobility performance. METHODS: Twenty elite wheelchair basketball athletes of low (n=10) and high classification (n=10), were tested in a wheelchair basketball directed field test. Athletes performed the test in their own wheelchair, which was modified for five additional conditions regarding seat height (high - low), mass (central - distributed) and grip...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29431556/the-fit-matters-influence-of-accelerometer-fitting-and-training-drill-demands-on-load-measures-in-rugby-league-players
#3
Blake D McLean, Cloe Cummins, Greta Conlan, Grant Duthie, Aaron J Coutts
PURPOSE: Determine the relationship between drill type and accelerometer-derived loads during various team sport activities, and examine the influence of unit fitting on these loads. METHODS: Sixteen rugby league players were fitted with microtechnology devices in either manufacturer vests or playing jerseys before completing standardised running, agility and tackling drills. Two-dimensional (2D) and three-dimensional (3D) accelerometer loads (BodyLoadTM) per km were compared across drills and fittings (i...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29431548/impact-of-energy-availability-health-and-sex-on-hemoglobin-mass-responses-following-lhth-altitude-training-in-elite-female-and-male-distance-athletes
#4
Ida A Heikura, Louise M Burke, Dan Bergland, Arja L T Uusitalo, Antti A Mero, Trent Stellingwerff
BACKGROUND: We investigated the effects of sex, energy availability (EA), and health status on the change in hemoglobin mass (ΔHbmass) in elite endurance athletes over ~3 to 4 weeks of Live-High/Train-High altitude training (Flagstaff, AZ, 2135m; n=27 females; n=21 males; 27% 2016 Olympians). METHODS: Pre- and post-camp Hbmass (optimized CO re-breathing method) and iron status were measured, EA was estimated via food and training logs and Low Energy Availability in Females Questionnaire (LEAF-Q) and a general injury/illness questionnaire was completed...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29431546/the-trainability-of-adolescent-soccer-players-to-brief-periodized-complex-training
#5
Athanasios Chatzinikolaou, Konstantinos Michaloglou, Alexandra Avloniti, Diamanda Leontsini, Chariklia K Deli, Dimitris Vlachopoulos, Luis Gracia-Marco, Sotirios Arsenis, Ioannis Athanailidis, Dimitrios Draganidis, Athanasios Z Jamurtas, Craig A Williams, Ioannis G Fatouros
PURPOSE: Τo investigate the effect of a complex, short-term strength/power training protocol on performance and body composition of elite early-adolescent soccer players. METHODS: Twenty-two players (14-15 years) were randomly assigned to (a) an experimental (EG, n=12, participated in a 5-week training protocol with traditional multi-joint power resistance exercises, Olympic-style lifts, plyometric drills and speed work, four times/week) or (b) a control group (CG, n=10)...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29431544/monitoring-training-load-and-well-being-during-the-in-season-phase-in-ncaa-division-i-men-s-basketball
#6
Daniele Conte, Nicholas Kolb, Aaron T Scanlan, Fabrizio Santolamazza
PURPOSE: this study aimed to characterize the weekly training load (TL) and well-being in college basketball players during the in-season phase. METHODS: Ten (6 guards and 4 forwards) male basketball players (age: 20.9 ± 0.9 years; stature: 195.0 ± 8.2 cm; body mass: 91.3 ± 11.3 kg) from the same Division I National Collegiate Athletic Association team were recruited to participate in this study. Individualized training and game loads were assessed using the session rating of perceived exertion (sRPE) at the end of each training and game session, while well-being status was collected before each session...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29431538/the-use-of-microtechnology-to-monitor-collision-performance-in-professional-rugby-union
#7
Simon J MacLeod, Chris Hagan, Mikel Egaña, Jonny Davis, David Drake
AIMS: To determine if microtechnology - derived collision loads discriminate between collision performance and compare the physical and analytical components of collision performance between positional groups. METHODS: Thirty-seven professional male rugby union players participated in this study. Collision events from 11 competitive matches were coded using specific tackle and carry classifications based on the ball-carrier's collision outcome. Collisions were automatically detected using 10Hz microtechnology units...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29431537/workload-fatigue-and-muscle-damage-in-an-u20-rugby-union-team-over-an-intensified-international-tournament
#8
Mathieu Lacome, Christopher Carling, Jean-Philippe Hager, Gerard Dine, Julien Piscione
PURPOSE: This study examined the effects of an intensified tournament on workload, perceptual and neuromuscular fatigue and muscle damage responses in an international under-20 rugby union team. METHODS: Players were subdivided into two groups according to match-play exposure time: high (HEG, n=13) and low (LEG, n=11). Measures monitored over the 19-day period included training session (n=10) and match (n=5) workload determined via global positioning systems and session ratings of perceived exertion (sRPE)...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345556/positional-differences-in-elite-basketball-selecting-appropriate-training-load-measures
#9
Luka Svilar, Julen Castellano, Igor Jukic, David Casamichana
PURPOSE: The purpose of this paper was to study the structure of interrelationships among external training load measures and how these vary among different positions in elite basketball. METHODS: Eight external variables of jumping (JUMP), acceleration (ACC), deceleration (DEC) and change of direction (COD), and two internal load variables (RPE and sRPE) were collected from 13 professional players with 300 session records. Three playing positions were considered: guards (n=4), forwards (n=4) and centers (n=5)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345555/the-preparation-period-in-basketball-training-load-and-neuromuscular-adaptations
#10
Davide Ferioli, Andrea Bosio, Johann C Bilsborough, Antonio La Torre, Michele Tornaghi, Ermanno Rampinini
PURPOSE: To investigate the 1) effect of the preparation period on the neuromuscular characteristics of 12 professional (PRO) and 16 semi-professional (SEMI-PRO) basketball players; 2) relationships between training load indices and changes in neuromuscular physical performance. METHODS: Prior to and following the preparation period, players underwent a counter-movement jump (CMJ) test, followed by a repeated change of direction (COD) test consisting of 4 levels with increasing intensities...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345552/preceding-race-efforts-affect-pacing-and-short-track-speed-skating-performance
#11
Marco J Konings, Florentina J Hettinga
PURPOSE: To examine whether preceding high-intensity race efforts in a competitive weekend affected pacing behaviour and performance in elite short-track speed skaters. METHODS: Finishing and intermediate lap times were gathered from 500, 1000 and 1500 m Short Track Speed Skating World Cups during the seasons 2011-2016. The effect of preceding races on pacing behaviour and performance was explored using two studies. Study I: the effect of competing in extra races due to the Repechage (Rep) system, leading to an increased number of high-intensity race efforts prior to the subsequent main tournament race, was explored (500m: N=32, 1000m: N=34; 1500m: N=47)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345547/are-current-physical-match-performance-metrics-in-elite-soccer-fit-for-purpose-or-is-the-adoption-of-an-integrated-approach-needed
#12
Paul S Bradley, Jack D Ade
Time-motion analysis is a valuable data-collection technique used to quantify the physical match performance of elite soccer players. For over 40 years researchers have adopted a 'traditional' approach when evaluating match demands by simply reporting the distance covered or time spent along a motion continuum of walking through to sprinting. This methodology quantifies physical metrics in isolation without integrating other factors and this ultimately leads to a one-dimensional insight into match performance...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345545/decisive-moment-a-metric-to-determine-success-in-elite-karate-bouts
#13
Montassar Tabben, Bianca Miarka, Karim Chamari, Ralph Beneke
PURPOSE: To evaluate the concept of Decisive-Moment (DM) as a novel analysis approach providing insights into factors leading to successful high-performance Kumite karate outcomes using time-motion variables. DM represents the moment from which one of the two opponents dominates uninterrupted the other until the end of the fight. METHODS: 120 elite seniors (60 males and 60 females) World Karate Federation combats were analysed during two World Championships (2012 and 2014)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345542/effects-of-late-night-training-on-slow-wave-sleep-episode-and-hour-by-hour-derived-nocturnal-cardiac-autonomic-activity-in-female-soccer-players
#14
Júlio A Costa, João Brito, Fábio Y Nakamura, Eduardo M Oliveira, António N Rebelo
PURPOSE: To assess the sensitivity of nocturnal heart rate variability (HRV) monitoring methods to the effects of late-night soccer training sessions in female athletes. METHODS: Eleven female soccer players competing in the 1st division of the Portuguese soccer league wore HR monitors during night-sleep throughout a one-week competitive in-season microcycle, after late-night training sessions (n = 3) and rest days (n = 3). HRV was analyzed through "slow-wave sleep episode" (SWSE; 10 min duration) and "hour-by-hour" (all the RR intervals recorded throughout the hours of sleep)...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345541/running-mechanics-and-metabolic-responses-with-water-bottles-and-bottle-belt-holders
#15
Heather K Vincent, Laura A Zdziarski, Kyle Fallgatter, Giorgio Negron, Cong Chen, Trevor Leavitt, MaryBeth Horodyski, Joseph G Wasser, Kevin R Vincent
PURPOSE: This study determined whether differential kinematics, kinetics, rates of energy use and cardiopulmonary responses occurred during running with water bottles and bottle belt holders compared to running only. METHODS: Trained runners (N=42; 27.2±6.4 yr) ran on an instrumented treadmill for four conditions in a randomized order: 1) control run (CON); 2) hand-held full water bottle (FULL, 16.9 fluid oz; 454 g); 3) hand-held half-full water bottle (HALF, 8...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345537/post-match-perceived-exertion-feeling-and-wellness-in-professional-soccer-players
#16
Mohamed Saifeddin Fessi, Wassim Moalla
PURPOSE: The aim of this study was to assess post-match perceived exertion, feeling and wellness according to the match outcome (winning, drawing or losing) in professional soccer players. METHODS: Twelve outfield players were followed during 52 official matches where the outcomes (win, draw or lose) were noted. Following each match players completed both a 10-point scale rating of perceived exertion (RPE) and an 11-point scale rating of perceived feeling. Rating of perceived sleep quality, stress, fatigue and muscle soreness were collected separately on a 7-point scale the day following each match...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345532/ischemic-pre-conditioning-does-not-influence-maximal-sprint-acceleration-performance
#17
Kyle M A Thompson, Alanna K Whinton, Shane Ferth, Lawrence L Spriet, Jamie F Burr
Ischemic pre-conditioning (IPC) was initially developed to protect the myocardium from ischemia through altered cardiocyte metabolism. Due to the observed effects on metabolism and oxygen kinetics, IPC gained interest as a potential ergogenic aid in sport. Limited research evaluating the effects of IPC on maximal short-duration activities has been performed and of the existing literature, mixed outcomes resulting from intra-subject variation may have clouded the efficacy of this technique for enhancing sprint performance...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29345524/recovery-and-performance-in-sport-consensus-statement
#18
Michael Kellmann, Maurizio Bertollo, Laurent Bosquet, Michel Brink, Aaron Coutts, Rob Duffield, Daniel Erlacher, Shona Halson, Anne Hecksteden, Jahan Heidari, Romain Meeusen, Iñigo Mujika, Claudio Robazza, Sabrina Skorski, Ranel Venter, Jürgen Beckmann
The relationship between recovery and fatigue and its impact on performance has attracted the interest of sports science for many years. An adequate balance between stress (training and competition load, other life demands) and recovery is essential for athletes to achieve continuous high-level performance. Research has focused on the examination of physiological and psychological recovery strategies to compensate external and internal training and competition loads. A systematic monitoring of recovery and the subsequent implementation of recovery routines aims at maximizing performance and preventing negative developments such as underrecovery, non-functional overreaching, the overtraining syndrome, injuries, or illnesses...
January 18, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29338477/let-the-race-begin
#19
Jos J de Koning
No abstract text is available yet for this article.
January 17, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28459360/strength-training-for-middle-and-long-distance-performance-a-meta-analysis
#20
Nicolas Berryman, Inigo Mujika, Denis Arvisais, Marie Roubeix, Carl Binet, Laurent Bosquet
PURPOSE: To assess the net effects of strength training on middle- and long-distance performance through a meta-analysis of the available literature. METHODS: Three databases were searched, from which 28 of 554 potential studies met all inclusion criteria. Standardized mean differences (SMDs) were calculated and weighted by the inverse of variance to calculate an overall effect and its 95% confidence interval (CI). Subgroup analyses were conducted to determine whether the strength-training intensity, duration, and frequency and population performance level, age, sex, and sport were outcomes that might influence the magnitude of the effect...
January 5, 2018: International Journal of Sports Physiology and Performance
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