journal
MENU ▼
Read by QxMD icon Read
search

International Journal of Sports Physiology and Performance

journal
https://www.readbyqxmd.com/read/27918679/movement-patterns-and-metabolic-responses-during-an-international-rugby-sevens-tournament
#1
Anthony Couderc, Claire Thomas, Mathieu Lacome, Julien Piscione, Julien Robineau, Rémi Delfour-Peyrethon, Rachel Borne, Christine Hanon
PURPOSE: This study investigated the running-demands and associated metabolic perturbations during an official rugby sevens tournament. METHODS: Twelve elite players participated in seven matches wearing Global Positioning System units. Maximal sprinting speed (MSS) and maximal aerobic speed (MAS) were measured. High-intensity threshold was individualized relative to MAS (>100% of MAS) and very high-intensity distance were reported relative to both MAS and MSS...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918678/gait-asymmetry-during-400-to-1000-m-high-intensity-track-running-in-relation-to-injury-history
#2
Rahel Ammann, Wolfgang Taube, Thomas Wyss
PURPOSE: The aim of the present study was to quantify gait asymmetry in well-trained runners, with and without previous injuries during interval training sessions incorporating different distances. METHODS: Twelve well-trained runners participated in eight high-intensity interval training sessions on a synthetic track over a 4-week period. The training consisted of 10 × 400 m, 8 × 600 m, 7 × 800 m, and 6 × 1000 m running. Using an inertial measurement unit, the ground contact time (GCT) of every step was recorded...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918677/a-comparison-of-isometric-mid-thigh-pull-strength-vertical-jump-sprint-speed-and-change-of-direction-speed-in-academy-netball-players
#3
Christopher Thomas, Paul Comfort, Paul A Jones, Thomas Dos'Santos
PURPOSE: To investigate (a) the relationships between maximal isometric strength, vertical jump (VJ), sprint speed, and change of direction speed (CODS) in academy netball players, and (b) determine whether players who have high performance in isometric strength testing would demonstrate superior performance in VJ, sprint speed, and CODS measures. METHODS: Twenty-six young female netball players (age = 16.1 ± 1.2 years; height = 173.9 ± 5.7 cm; body mass = 66...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918676/effects-of-training-load-and-leg-dominance-on-achilles-and-patellar-tendon-structure
#4
Alireza Esmaeili, Andrew M Stewart, William G Hopkins, George P Elias, Robert J Aughey
PURPOSE: Detrimental changes in tendon structure increase the risk of tendinopathies. The aim of this study was to investigate the influence of individual internal and external training loads and leg dominance on changes in the Achilles and patellar tendon structure. METHODS: The internal structure of the Achilles and patellar tendons of both limbs of 26 elite Australian footballers was assessed using ultrasound tissue characterization at the beginning and the end of an 18 week pre-season...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918675/biomechanics-in-paralympics-implications-for-performance
#5
Floor Morriën, Matthew J D Taylor, Florentina J Hettinga
PURPOSE: To provide an overview of biomechanical studies in Paralympic research and their relevance for performance in Paralympic sports. METHODS: Search terms ' Paralympic Biomechanics', 'Paralympic Sport Performance', 'Paralympic Athlete Performance', and Paralympic Athlete' were entered into the electronic database PubMed. RESULTS: Thirty-four studies were included. Biomechanical studies in Paralympics mainly contributed to performance enhancement by technical optimization (n=32) and/or injury prevention (n=6)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918673/predictive-indicators-of-overuse-injuries-in-adolescent-endurance-athletes
#6
Daniel Martínez-Silván, Jaime Díaz-Ocejo, Andrew Murray
PURPOSE: To analyse the influence of training exposure and the utility of self-report questionnaires on predicting overuse injuries in adolescent endurance athletes. METHODS: 5 adolescent male endurance athletes (15.7 ± 1.4 yr) from a full-time sports academy answered 2 questionnaires (Recovery Cue; RC-q & Oslo Sports Trauma Research questionnaire; OSTRC-q) on a weekly basis for one season (37 wks) in order to detect (1) signs of overtraining and under-recovery (RC-q) and (2) early symptoms of lower limb injuries (OSTRC-q)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918670/combined-plyometric-strength-training-improves-ice-hockey-players-on-ice-sprint
#7
Torstein E Dæhlin, Ole C Haugen, Simen Haugerud, Ivana Hollan, Truls Raastad, Bent R Rønnestad
: Combined plyometric and strength training have previously been suggested as a strategy to improve skating performance in ice hockey players. However, the effects of combined plyometric and strength training has not been previously been compared to the effects of strength training only. PURPOSE: To compare the effects of combined plyometric and strength training on ice hockey players' skating sprint performance with strength training only. METHODS: Eighteen participants were randomly assigned to two groups that completed 5 strength-training sessions per week for 8 weeks...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918669/the-within-season-distribution-of-external-training-and-racing-workload-in-professional-male-road-cyclist
#8
Alan J Metcalfe, Paolo Menaspà, Vincent Villerius, Marc Quod, Jeremiah J Peiffer, Andrew D Govus, Chris R Abbiss
PURPOSE: To describe the within-season external workloads of professional male road cyclists for optimal training prescription. METHODS: Training and racing of four international competitive professional male cyclists (age 24 ± 2 y, body mass 77.6 ± 1.5 kg) were monitored for 12 months prior to the world team time trial championships. Three within-season phases leading up to the team time trial world championships on 20(th) Sept 2015 were defined as phase one (Oct - Jan), phase two (Feb - May) and phase three (June - Sept)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918668/the-influence-of-changes-in-acute-training-load-on-daily-sensitivity-of-morning-measured-fatigue-variables-in-elite-soccer-players
#9
Robin T Thorpe, Anthony J Strudwick, Martin Buchheit, Greg Atkinson, Barry Drust, Warren Gregson
PURPOSE: To determine the sensitivity of a range of potential fatigue measures to daily training load accumulated over the previous two, three and four days during a short in-season competitive period in elite senior soccer players (n=10). METHODS: Total high-speed running distance, perceived ratings of wellness (fatigue, muscle soreness, sleep quality), counter-movement jump height (CMJ), submaximal heart rate (HRex), post-exercise heart rate recovery (HRR) and heart rate variability (HRV: Ln rMSSD) were analysed during an in-season competitive period (17 days)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918667/neuromuscular-fatigue-aetiology-after-repeated-sprints-depends-on-exercise-modality
#10
Katja Tomazin, Jean-Benoit Morin, Guillaume Y Millet
PURPOSE: The aim of the study was to compare neuromuscular fatigue induced by repeated sprint running vs cycling. METHODS: Eleven active male participants performed two repeated maximal sprint protocol (5×6 s, 24-s rest periods, 4 sets, 3-min between sets), one in running (treadmill) and one in cycling (cycle ergometer). Neuromuscular function, evaluated before (PRE), 30 s after the first (S1), the second (S2), and the last set (LAST), and 5 min after the last set (POST5), consisted in determining knee extensors maximal voluntary torque (MVC), voluntary activation (VA), single twitch (Tw), high- (Db100) and low- (Db10) frequency torque, and maximal muscle compound action potential (M-wave) amplitude and duration of vastus lateralis...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918666/quantification-of-training-and-competition-loads-in-endurance-sports-methods-and-applications
#11
Iñigo Mujika
Training quantification is basic to evaluate an endurance athlete's responses to the training loads, ensure adequate stress/recovery balance and determine the relationship between training and performance. Quantifying both external and internal workload is important, because the external workload does not measure the biological stress imposed by the exercise sessions. Generally used quantification methods include retrospective questionnaires, diaries, direct observation and physiological monitoring, often based on the measurement of oxygen uptake, heart rate and blood lactate concentration...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918665/relationships-between-internal-and-external-match-load-indicators-in-soccer-match-officials
#12
Daniel Castillo, Matthew Weston, Shaun J McLaren, Jesús Cámara, Javier Yanci
The aims of this study were to describe the internal and external match load (ML) of refereeing activity during official matches and also to investigate the relationship among the methods of ML quantification across a competitive soccer season. A further aim was to examine the usefulness of differential perceived exertion (dRPE) as a tool for monitoring internal ML in soccer referees. Twenty field referees (FR) and 43 assistant referees (AR) participated in this study. Data were collected from 30 competitive matches (FR = 20 observations, AR = 43 observations) and included measures of internal (Edwards' heart rate derived training impulse [TRIMPEDW]), external (total distance covered [TD], distance covered at high speeds [HSR] and player load [PL]) ML, differentiated ratings of perceived respiratory [sRPEres ML] and leg muscle [sRPEmus ML] exertion)...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918664/modern-techniques-and-technologies-applied-to-training-and-performance-monitoring
#13
William A Sands, Ashley A Kavanaugh, Steven R Murray, Jeni R McNeal, Monèm Jemni
Athlete preparation and performance continues to increase in complexity and costs. Modern coaches are shifting from reliance on personal memory, experience, and opinion to evidence from collected training load data. Training load monitoring may hold vital information for developing systems of monitoring that follow the training process with such precision that both performance prediction and day-to-day management of training become an adjunct to preparation and performance. Time series data collection and analyses in sport are still in their infancy with considerable efforts being applied in "big-data" analytics and models of the appropriate variables to monitor and methods for doing so...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918663/comparison-of-critical-power-and-w-derived-from-two-or-three-maximal-tests
#14
Len Parker Simpson, Mehdi Kordi
PURPOSE: Typically, accessing the asymptote (Critical Power; CP) and curvature constant (W') parameters of the hyperbolic power-duration relationship requires multiple constant-power, exhaustive exercise trials, spread over several visits. However, more recently single-visit protocols and personal power meters have been used. We investigated the practicality of using a two-trial, single-visit protocol in providing reliable CP & W' estimates. METHODS: 8 trained cyclists underwent 3- and 12-min maximal exercise trials in a single session to derive (2-trial) CP & W' estimates...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918662/effects-of-a-two-week-high-intensity-training-camp-on-sleep-activity-of-professional-rugby-league-athletes
#15
Heidi R Thornton, Grant M Duthie, Nathan W Pitchford, Jace A Delaney, Dean T Benton, Ben J Dascombe
PURPOSE: To investigate the effects of a training camp on the sleep characteristics of professional rugby league players compared to a home period. METHODS: During a seven-day home and 13-day camp period, time in bed (TIB), total sleep time (TST), sleep efficiency (SE) and wake after sleep onset (WASO) were measured using wristwatch actigraphy. Subjective wellness and training loads (TL) were also collected. Differences in sleep and TL between the two periods and the effect of daytime naps on night time sleep were examined using linear mixed models...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918661/how-does-a-short-interrupted-recovery-break-affect-performance-and-how-is-it-assessed-a-study-on-acute-effects
#16
Maximilian Pelka, Alexander Ferrauti, Tim Meyer, Mark Pfeiffer, Michael Kellmann
A recovery process with optimal prerequisites, which is interrupted, is termed disrupted recovery. Whether this process has an influence on performance-related factors needs to be investigated. Therefore, the aim of this study was to examine how a short disturbance of a recovery phase is assessed and whether subsequent repeated sprint performance is affected by it. A quasi-experimental 2x2-factors cross-over design with 34 sport science undergraduate students (age 20.3 ± 2.1) was applied. Factors were the type of intervention (power nap vs...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918660/vo2-at-maximal-and-supramaximal-intensities-lessons-to-high-interval-training-in-swimming
#17
Ana Sousa, João Paulo Vilas-Boas, Ricardo J Fernandes, Pedro Figueiredo
PURPOSE: To establish appropriate work intensity for interval training that would elicit maximal oxygen uptake (VO2max) for well-trained swimmers. METHODS: 12 male competitive swimmers completed an incremental protocol to determine the minimum velocity at VO2max (vVO2max) and, in randomized order, three square wave exercises from rest to 95, 100 and 105% of vVO2max. Temporal aspects of the VO2 response were examined in these latter. RESULTS: Swimming at 105% of vVO2max took less (p<0...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918659/importance-of-various-training-load-measures-on-injury-incidence-of-professional-rugby-league-athletes
#18
Heidi R Thornton, Jace A Delaney, Grant M Duthie, Ben J Dascombe
PURPOSE: To investigate the ability of various internal and external training load (TL) monitoring measures to predict injury incidence amongst positional groups within professional rugby league athletes. METHODS: TL and injury data were collected across 3 seasons (2013-2015) from twenty-five players competing in the National Rugby League competition. Daily TL data were included in the analysis, including session rating of perceived exertion (sRPE-TL), total distance (TD), high-speed running distance (HSD; >5m·s(-1)) and high-metabolic power distance (HPD; >20 W·kg(-1))...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918658/countermovement-jump-phase-characteristics-of-senior-and-academy-rugby-league-players
#19
John J McMahon, Shannon Murphy, Sophie J E Rej, Paul Comfort
PURPOSE: Gross measures of countermovement jump (CMJ) performance are commonly used to track maturational changes in neuromuscular function within rugby league (RL). The purpose of this study was to conduct both a gross and a more detailed temporal phase analysis of the CMJ performances of senior and academy RL players, to provide greater insight into how neuromuscular function differs between these groups. METHODS: Twenty senior and fourteen academy (under-19) male RL players performed three maximal effort CMJs on a force platform with forward dynamics subsequently employed to allow gross performance measures and entire kinetic and kinematic-time curves to be compared between groups...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918657/telomere-length-in-elite-athletes
#20
Carlos A Muniesa, Zoraida Verde, Germán Diaz-Ureña, Catalina Santiago, Fernando Gutiérrez, Enrique Díaz, Félix Gómez-Gallego, Helios Pareja-Galeano, Luisa Soares-Miranda, Alejandro Lucia
PURPOSE: Growing evidence suggests that regular, moderate-intensity physical activity is associated with an attenuation of leucocyte telomere length (LTL) shortening. However, more controversy exists regarding higher exercise loads, such as those imposed by elite sports participation. METHODS: We have investigated LTL differences between young elite athletes (n=61, 54% men, aged [mean±SD] 27.2±4.9 years) and their healthy non-smoker, physically inactive controls (n=64, 52% men, 28...
December 5, 2016: International Journal of Sports Physiology and Performance
journal
journal
41383
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"