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International Journal of Sports Physiology and Performance

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https://www.readbyqxmd.com/read/28952840/quantifying-cricket-fast-bowling-skill
#1
Simon A Feros, Warren B Young, Brendan J O'Brien
OBJECTIVES: To evaluate the current evidence regarding the quantification of cricket fast bowling skill. METHODS: Studies that assessed fast bowling skill (bowling speed and accuracy) were identified from searches in SPORTDiscus (EBSCO) in June 2017. The reference lists of identified papers were also examined for relevant investigations. RESULTS: Sixteen papers matched the inclusion criteria, and discrepancies in assessment procedures were evident...
September 27, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28952837/training-intensity-distribution-over-a-four-year-cycle-in-olympic-champion-rowers-different-roads-lead-to-rio
#2
Daniel J Plews, Paul B Laursen
The purpose of this study was to compare the training intensity distribution (TID) of the undefeated world champion male rowing New Zealand (kiwi) pair over a four-year Olympic cycle, across training phases, training years, and between individuals. Training data, including heart rate and boat speed, were recorded in the athletes rowing in the same boat between March 2013 and August 2016, ending with the Rio Olympics final. Progressive exercise tests assessed first (LT1) and second (LT2) lactate thresholds and associated heart rates, to determine the percentage of training performed below, between and above these demarcation points...
September 27, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28952831/perception-of-breakfast-ingestion-enhances-high-intensity-cycling-performance
#3
Stephen A Mears, Kathryn Dickinson, Kurt Bergin-Taylor, Reagan Dee, Jack Kay, Lewis J James
PURPOSE: To examine the effect on short duration, high intensity cycling time trial performance when a semi-solid breakfast containing carbohydrate or a taste and texture matched placebo is ingested 90 minutes pre-exercise compared to a water control. METHODS: Thirteen well trained cyclists (25 ± 8 years, 71.1 ± 5.9 kg, 1.76 ± 0.04 m, 383 ± 46 Wmax, VO2peak 4.42 ± 0.53 L·min(-1)) performed three experimental trials examining breakfast ingestion 90 minutes before a 10 minute steady state cycle (60% Wmax) and a ~20 minute time trial (to complete a workload target of 376 ± 36 kJ)...
September 27, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28952829/mental-fatigue-and-physical-and-cognitive-performance-during-a-two-bout-exercise-test
#4
Susan Vrijkotte, Romain Meeusen, Cloe Vandervaeren, Luk Buyse, Jeroen van Cutsem, Nathalie Pattyn, Bart Roelands
PURPOSE: The two bout exercise protocol has been developed to diagnose non-functional overreaching (NFO) and the 'Overtraining Syndrome' (OTS). It consists of two maximal exercise bouts separated by 4 hours. Mental fatigue negatively influences performance but the effects of its occurrence during the two bout exercise protocol have never been investigated. The aim of this study was to examine whether mental fatigue (induced during the rest period) influences physical and cognitive performance during/after the second exercise bout of the two bout exercise protocol...
September 27, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28952828/locomotor-and-heart-rate-responses-of-floaters-during-small-sided-games-in-elite-soccer-players-effect-of-pitch-size-and-inclusion-of-goal-keepers
#5
Mathieu Lacome, Ben M Simpson, Yannick Cholley, Martin Buchheit
PURPOSE: To (1) compare the locomotor and heart rate responses between floaters and regular players during both small and large small sided games (SSGs) and (2) examine whether the type of game (i.e., game simulation vs possession game) affects the magnitude of the difference between floaters and regular players. METHODS: Data were collected in 41 players belonging to an elite French football team during three consecutive seasons (2014-2017). 5-Hz GPS were used to collect all training data, with the Athletic Data Innovation analyser (v5...
September 27, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872423/the-use-of-relative-speed-zones-in-australian-football-are-we-really-measuring-what-we-think-we-are
#6
Nick B Murray, Tim J Gabbett, Andrew D Townshend
OBJECTIVES: This study aimed to examine the difference between absolute and relative workloads, injury likelihood, and the acute:chronic workload ratio (ACWR) in elite Australian football. DESIGN: Single cohort, observational study. METHODS: Forty-five elite Australian football players from one club participated in this study. Running workloads of players were tracked using Global Positioning System technology, and were categorised using either; (1) absolute, pre-defined speed thresholds, or (2) relative, individualised speed thresholds...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872389/training-related-changes-in-force-power-profiles-implications-for-the-skeleton-start
#7
Steffi L Colyer, Keith A Stokes, James L J Bilzon, Danny Holdcroft, Aki I T Salo
PURPOSE: Athletes' force-power characteristics influence sled velocity during the skeleton start, which is a crucial determinant of performance. This study characterised force-power profile changes across an 18-month period and investigated the associations between these changes and start performance. METHODS: Seven elite- and five talent-squad skeleton athletes' (representing 80% of registered athletes in the country) force-power profiles and dry-land push-track performances were assessed at multiple time-points over two 6-month training periods and one 5-month competition season...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872386/on-the-importance-of-front-side-mechanics-in-athletics-sprinting
#8
Thomas Haugen, Jørgen Danielsen, Leif Olav Alnes, David McGhie, Øyvind Sandbakk, Gertjan Ettema
Practitioners have for many years argued that athletic sprinters should optimise front-side mechanics (leg motions occurring in front of the extended line through the torso) and minimise back-side mechanics. This study aimed to investigate if variables related to front- and back-side mechanics can be distinguished from other previously highlighted kinematic variables (spatiotemporal variables and variables related to segment configuration and velocities at touchdown) in how they statistically predict performance...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872385/new-records-in-human-power
#9
Thomas Haugen, Gøran Paulsen, Stephen Seiler, Øyvind Sandbakk
Maximal aerobic and anaerobic power are crucial performance determinants in most sports disciplines. Numerous studies have published power data from elite athletes over the years, particularly in runners, cyclists, rowers and cross-country skiers. In this invited review, we define the current "world records" in human upper limits of aerobic and anaerobic power. Currently, V̇O2max values of ~7.5 and 7.0 L·min(-1) in male cross-country (XC) skiers and rowers, respectively, and/or ~90 ml·kg(-1)·min(-1) in XC skiers, cyclists and runners can be described as upper human limits for aerobic power...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872384/feasibility-of-the-two-point-method-for-determining-the-one-repetition-maximum-in-the-bench-press-exercise
#10
Amador García-Ramos, Guy Gregory Haff, Francisco Luis Pestaña-Melero, Alejandro Pérez-Castilla, Francisco Javier Rojas, Carlos Balsalobre-Fernández, Slobodan Jaric
PURPOSE: This study compared the concurrent validity and reliability of previously proposed generalized group equations for estimating the bench press (BP) one-repetition maximum (1RM) with the individualized load-velocity relationship modelled with a two-point method. METHODS: Thirty men (BP 1RM relative to body mass: 1.08 0.18 kg·kg(-1)) performed two incremental loading tests in the concentric-only BP exercise and another two in the eccentric-concentric BP exercise to assess their actual 1RM and load-velocity relationships...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872383/weight-management-practices-of-australian-olympic-combat-sport-athletes
#11
Reid Reale, Gary Slater, Louise M Burke
PURPOSE: Combat sport athletes undertake chronic and rapid weight loss (RWL) practices to qualify for weight divisions lower than their training weight. Variation between sports in the prevalence, methods, and magnitude of weight loss as well as recovery practices may be influenced by factors including competition level and culture. Differences in methodologies of previous research in combat sports make direct comparisons difficult, thus this study aimed to examine weight loss practices among all Olympic combat sports in Australia, using standardised methodology...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872381/pneumatic-compression-fails-to-improve-performance-recovery-in-trained-cyclists
#12
Ryan G Overmayer, Matthew W Driller
PURPOSE: To examine the efficacy of Intermittent Sequential Pneumatic Compression (ISPC) on exercise recovery and subsequent performance, when implemented between a 20-min cycling bout (simulated scratch race) and a 4-min cycling test (simulated individual pursuit), as experienced during an Omnium track cycling competition. METHODS: Twenty-one (13 male, 8 female, mean ± SD; age: 36 ± 14 years) trained cyclists completed a familiarisation trial followed by two experimental trials in a counterbalanced, crossover design...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872380/optimizing-heat-acclimation-for-endurance-athletes-high-vs-low-intensity-training
#13
Cyril Schmit, Rob Duffield, Christophe Hausswirth, Jeanick Brisswalter, Yann Le Meur
PURPOSE: We sought to determine the effect of high- vs. low-intensity training in the heat and ensuing taper period in the heat on endurance performance. METHODS: Nineteen well-trained triathletes undertook 5 days of normal training and a 1-week taper, including either low- (HA-L, n=10) or high-intensity (HA-H, n=9) training sessions in the heat (30°C, 50% of relative humidity). A control group (n=10) reproduced their usual training in thermoneutral conditions...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872379/influence-of-different-inertial-loads-on-basic-training-variables-during-the-flywheel-squat-exercise
#14
Rafael Sabido, Jose Luis Hernández-Davó, Gabriel T Pereyra-Gerber
PURPOSE: This study aimed to analyse the effects of different inertial loads on power production and power maintenance), as well as the number of sessions required for proper familiarization during the flywheel quarter-squat. METHODS: Twenty-four high-level handball players attended four testing sessions consisting of 4 sets of 10 repetitions using 4 different inertial loads (0.025, 0.050, 0.075 and 0.100 kg·m(2)). In addition, a fifth set of 15 repetitions was performed...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872377/the-influence-of-rotations-on-match-running-performance-in-female-australian-football-midfielders
#15
Georgia M Black, Tim J Gabbett, Rich D Johnston, Geraldine Naughton, Michael H Cole, Brian Dawson
PURPOSE: With female Australian football (AF) gaining popularity, the understanding of match demands is becoming increasingly important. The aim of this study compare running performances of rotated and whole-quarter state level female Australian Football players during match quarters. METHODS: Twenty-two state-level female AF midfielders wore global positioning system units during 14 games to evaluate activity profiles. The Yo-Yo Intermittent Recovery Test (Level 1[Yo-Yo IR1]) was used as a measure of high-intensity running ability...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872376/caffeine-and-physiological-responses-to-submaximal-exercise-a-meta-analysis
#16
Mark Glaister, Conor Gissane
The aim of this study was to carry out a systematic review and meta-analysis of the effects of caffeine supplementation on physiological responses to submaximal exercise. 26 studies met the inclusion criteria of adopting double-blind, randomised, crossover designs that included a sustained (5 - 30 minutes) fixed-intensity bout of submaximal exercise (constrained to 60 - 85% V̇O2max) using a standard caffeine dose of 3 - 6 mg∙kg(-1) administered 30 - 90 minutes prior to exercise. Meta-analyses were completed using a random-effects model, and data are presented as raw mean difference (D) with associated 95% confidence limits (CL95)...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872374/changes-in-choice-reaction-time-during-and-after-8-days-exhaustive-cycling-are-not-related-to-changes-in-physical-performance
#17
Twan Ten Haaf, Selma van Staveren, Danilo Iannetta, Bart Roelands, Romain Meeusen, Maria F Piacentini, Carl Foster, Leo Koenderman, Hein A M Daanen, Jos J de Koning
PURPOSE: Reaction time has been proposed as a training monitoring tool, but to date results are equivocal. Therefore, it was investigated whether reaction time can be used as a monitoring tool to establish overreaching. METHODS: The study included 30 subjects (11 female/19 male, age: 40.8±10.8 y, VO2max: 51.8±6.3 ml/kg/min) who participated in an 8-day cycling event. The external exercise load increased approximately 900% compared to the preparation period. Performance was measured before and after the event using a maximal incremental cycling test...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872372/the-specificity-of-rugby-union-training-sessions-in-preparation-for-match-demands
#18
Patrick G Campbell, Jonathan M Peake, Geoffrey M Minett
PURPOSE: Investigations into the specificity of rugby union training practices in preparation for competitive demands has predominantly focussed on physical and physiological demands. The evaluation of the contextual variance in perceptual strain or skill requirements between training and matches in rugby union is unclear, yet holistic understanding may assist to optimise training design. This study evaluated the specificity of physical, physiological, perceptual and skill demands of training sessions compared with competitive match-play in pre-professional, elite club rugby union...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872371/reliability-of-wearable-inertial-measurement-units-to-measure-physical-activity-in-team-handball
#19
Live S Luteberget, Benjamin R Holme, Matt Spencer
PURPOSE: The purpose of this study was to assess the reliability and sensitivity of commercially available inertial measurement units (IMU) to measure physical activity in team handball. METHOD: Twenty-two handball players were instrumented with two IMUs (OptimEye S5, Catapult Sports, Australia) taped together. They participated in either a laboratory assessment (n=10), consisting of seven team handball specific tasks, or field assessment (n=12) conducted in twelve training sessions...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28872370/neuromuscular-responses-to-conditioned-soccer-sessions-assessed-via-gps-embedded-accelerometers-insights-into-tactical-periodization
#20
Martin Buchheit, Mathieu Lacome, Yannick Cholley, Ben M Simpson
PURPOSE: To 1) examine the reliability of field-based running-specific measures of neuromuscular function assessed via GPS-embedded accelerometers and 2) examine their responses to three typical conditioned sessions (i.e., Strength, Endurance and Speed) in elite soccer players. METHODS: Before and immediately after each session, vertical jump (CMJ) and adductors squeeze strength (Groin) performances were recorded. Players also performed a 4-min run at 12 km/h followed by 4 ~60-m runs (run =12 s, r =33 s)...
September 5, 2017: International Journal of Sports Physiology and Performance
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