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International Journal of Sports Physiology and Performance

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https://www.readbyqxmd.com/read/29770720/the-biggest-event-of-the-beautiful-game-is-back
#1
Iñigo Mujika
No abstract text is available yet for this article.
May 17, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745789/the-physical-characteristics-of-specific-phases-of-play-during-rugby-union-match-play
#2
Dale B Read, Ben Jones, Sean Williams, Padraic Phibbs, Josh Darrall-Jones, Greg Roe, Jonathon Weakley, Andrew Rock, Kevin Till
PURPOSE: This study quantified the frequencies and timings of rugby union match-play phases (i.e., attacking, defending, ball in play (BIP) and ball out of play (BOP)) and then compared the physical characteristics of attacking, defending and BOP between forwards and backs. METHODS: Data were analysed from 59 male rugby union academy players (259 observations). Each player wore a micro-technology device (Optimeye S5, Catapult) with video footage analysed for phase timings and frequencies...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745788/3x3-basketball-performance-characteristics-and-changes-during-elite-tournament-competition
#3
Paul G Montgomery, Brendan D Maloney
PURPOSE: To determine the changes in game performance during tournament play of elite 3x3 basketball. METHODS: 361 males and 208 females competing in selected international tournaments had game demands assessed by wearable technology (GPS, inertial sensor, heart rate) along with post game blood lactate and perceived responses. Differences in the means for selected variables between games were compared using magnitude based inferences and reported with Effect Size and associated confidence limits, along with the percentage difference (ES; ±90%CL, %) of log-transformed data...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745787/time-trial-performance-in-world-class-speed-skaters-after-chronic-nitrate-ingestion
#4
Philippe Richard, Lymperis P Koziris, Mathieu Charbonneau, Catherine Naulleau, Jonathan Tremblay, François Billaut
PURPOSE: Nitrate supplementation can increase tolerance to high-intensity work rates, however limited data exist on the recovery of performance. We tested whether 5 days of nitrate supplementation could improve repeated time-trial performance in speed skating. METHODS: Using a double-blind, placebo-controlled, crossover design, 9 international-level short-track speed skaters ingested one high (juice blend, ~6.5mmol nitrate; HI) or low dose (juice blend, ~1mmol nitrate; LO) per day on days 1-4...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745785/dose-response-relationship-between-training-load-and-changes-in-aerobic-fitness-in-professional-youth-soccer-players
#5
John F Fitzpatrick, Kirsty M Hicks, Philip R Hayes
PURPOSE: The aim of this study was to compare the dose-response relationship between, traditional arbitrary speed thresholds versus an individualised approach, with changes in aerobic fitness in professional youth soccer players. METHODS: Fourteen youth soccer players, completed a 1500 metre time trial to estimate maximal aerobic speed (km.h-1 , (MAS)) at the start and the end of a six week period. Training load was monitored on a daily basis during this study. External load measures were; total distance covered (TD), total acceleration and deceleration distance > 2m...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745784/short-term-effects-of-rolling-massage-on-energy-cost-of-running-and-power-of-the-lower-limbs
#6
Nicola Giovanelli, Filippo Vaccari, Mirco Floreani, Enrico Rejc, Jasmine Copetti, Marco Garra, Lea Biasutti, Stefano Lazzer
PURPOSE: Self-myofascial release (SMFR) is a type of self-massage that is becoming popular among athletes. However, SMFR effects on running performance have not been investigated yet. The aim of the present study was to evaluate the effects of SMFR on cost of running (Cr). In addition, we evaluated the effects of SMFR on lower limbs muscle power. METHODS: The measurement of Cr and lower limb muscle power during squat jump (SJ) and counter movement jump (CMJ) were performed before (PRE), immediately after (POST) and 3hours after (POST 3h) a SMFR protocol (experimental condition)...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745780/heat-acclimation-by-post-exercise-hot-water-immersion-in-the-morning-reduces-thermal-strain-during-morning-and-afternoon-exercise-heat-stress
#7
Michael J Zurawlew, Jessica A Mee, Neil P Walsh
PURPOSE: Recommendations state that to acquire the greatest benefit from heat acclimation the clock-time of heat acclimation sessions should match the clock-time of expected exercise-heat stress. It remains unknown if adaptations by post-exercise hot water immersion (HWI) demonstrate time of day dependent adaptations. Thus, we examined whether adaptations following post-exercise HWI completed in the morning were present during morning and afternoon exercise-heat stress. METHODS: Ten males completed an exercise-heat stress test commencing in the morning (0945-h: AM) and afternoon (1445-h: PM; 40 min; 65% V̇O2max treadmill run) before (PRE) and after (POST) heat acclimation...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745773/muscle-oxygenation-rather-than-vo-2-max-is-a-strong-predictor-of-performance-in-sprint-canoe-kayak
#8
Myriam Paquette, François Bieuzen, François Billaut
PURPOSE: This study aimed to characterize the relationships between muscle oxygenation and performance during on- and off-water tests in highly trained sprint canoe-kayak athletes. METHODS: Thirty athletes (19 kayakers and 11 canoeists) performed a maximal incremental test on a canoe or kayak ergometer for determination of VO2max and examination of the relation between peak power output (PPO) and physiological parameters. A subset of 21 athletes also performed a 200-m and a 500-m (for women) or 1000-m (for men) on-water time trials...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745772/specificity-elicits-higher-maximal-and-submaximal-cardiorespiratory-responses-during-a-new-taekwondo-aerobic-test
#9
Matheus Hausen, Pedro Paulo Soares, Marcus Paulo Araujo, Débora Esteves, Hilbert Julio, Roberto Tauil, Marcus Junca, Flávia Porto, Emerson Franchini, Craig Alan Bridge, Jonas Gurgel
PURPOSE: The purpose of the present study was to propose and validate new taekwondo-specific cardiopulmonary exercise tests. METHODS: Twelve male national-level taekwondo athletes (age 20 ± 2 yrs; body mass 67.5 ± 5.7 kg; height 175 ± 8 cm; training experience 7 ± 3 yrs) performed three separate exercise tests in a randomized counterbalanced order: 1) a Treadmill Running Cardiopulmonary Exercise Test (CPET); 2) Continuous and 3) Interval Taekwondo Cardiopulmonary Exercise Tests (cTKDet and iTKDet, respectively)...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745765/is-the-functional-threshold-power-ftp-a-valid-surrogate-of-the-lactate-threshold
#10
Pedro L Valenzuela, Javier S Morales, Carl Foster, Alejandro Lucia, Pedro de la Villa
PURPOSE: This study aimed to analyze the relationship between the Functional Threshold Power (FTP) and the Lactate Threshold (LT). METHODS: 20 male cyclists performed an incremental test in which the LT was determined. At least 48 h later, they performed a 20-minute time trial and 95% of the mean power output (P20) was defined as FTP. Participants were divided into recreational (Peak Power Output [PPO] < 4.5 W∙kg-1 , n=11) or trained cyclists (PPO > 4.5 W∙kg-1 , n=9) according to their fitness status...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745743/elite-male-and-female-800-m-runners-display-different-pacing-strategies-during-seasons-best-performances
#11
Filipas Luca, Nerli Ballati Emiliano, Bonato Matteo, La Torre Antonio, Piacentini Maria Francesca
PURPOSE: To analyse the pacing profiles of the world top 800-m annual performances between 2010 and 2016, comparing male and female strategies. METHODS: One hundred and forty two performances were characterised for overall race times and 0-200 m, 200-400 m, 400-600 m, 600-800 m split times using available footage from YouTube. Only the best annual performance for each athlete was considered. Overall race and splits speed were calculated so that each lap speed could be expressed as a percentage of the mean race speed...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745739/training-performance-and-physiological-predictors-of-a-successful-elite-senior-career-in-junior-competitive-road-cyclists
#12
Ida S Svendsen, Espen Tønnesen, Leif Inge Tjelta, Stein Ørn
PURPOSE: to determine whether training, performance or physiological variables at age 18 can predict which athletes become World Tour (WT) riders at senior level. METHODS: Based on performance level age 23, 80 competitive male cyclists were retrospectively categorised into four groups: Retired (n=21), Club (n=26), Continental (n=24), or WT (n=9). Data collected at age 18 were analysed to determine whether training, performance or physiological variables differed significantly between groups...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745738/effect-of-prior-fatiguing-sport-specific-exercise-on-field-hockey-passing-ability
#13
Enzo Hollville, Vincent Le Croller, Yoshihiro Hirasawa, Rémi Husson, Giuseppe Rabita, Franck Brocherie
PURPOSE: This study aimed to evaluate the effect of multiple sets of repeated-sprint ability (RSA) induced fatigue on subsequent passing skill performance among field hockey. METHODS: Ten elite U-21 male field hockey players performed five sets of a combination of RSA test (6 × 20 m - 20 s of passive recovery) followed by a 1-min passing skill test (passing reception with subsequent passes at a pre-designed target). Fastest sprint time and cumulated sprint time for RSA test; total number of balls played, targeted and passing accuracy (number of balls targeted / total number of balls played) for passing skill test; heart rate (HR), blood lactate concentration ([La-]) and rating of perceived exertion (RPE) were collected throughout the protocol...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29745735/time-trial-performance-in-elite-speed-skaters-after-remote-ischemic-preconditioning
#14
Philippe Richard, François Billaut
PURPOSE: Speed skating leads to blood-flow restriction and deoxygenation in the lower limbs (especially the right leg) that may affect performance. Although the acute influence of such deoxygenation is not clearly understood, we tested whether remote ischemic preconditioning (RIPC) could modify muscular oxygenation and improve time-trial performance in that sport. METHODS: Using a randomized, single-blind, placebo-controlled, crossover design, 9 elite speed skaters performed 1000-m on-ice time-trials preceded by either RIPC of the upper limbs (3x5-min compression/5-min reperfusion cycles at 30 mmHg > arterial systolic pressure) or SHAM (10 mmHg)...
May 10, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29722611/the-race-has-begun-but-how-to-learn-how-to-race-and-pace
#15
Florentina J Hettinga
No abstract text is available yet for this article.
May 3, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29688136/predictors-of-attack-performance-in-high-level-male-volleyball-players
#16
Dimitrios Challoumas, Andreas Artemiou
PURPOSE: In volleyball, teams win the majority of points through attacks ('spikes') and therefore attack effectiveness (AE) is one of the most important predictors of victory. Traditionally, greater vertical jump heights (VJH) and higher spike speeds (SS) have been thought to increase AE, however relevant research is limited. Our aim was to assess the relationship of VJH and SS with AE as well as identify possible associations of demographic and anthropometric factors, including common volleyball injuries, with VJH, SS and AE...
April 24, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29688115/monitoring-players-readiness-using-predicted-heart-rate-responses-to-football-drills
#17
Mathieu Lacome, Ben Simpson, Nick Broad, Martin Buchheit
PURPOSE: To examine the ability of multivariate models to predict the HR responses to some specific training drills from various GPS variables and to examine the usefulness of the difference in predicted vs actual HR responses as an index of fitness or readiness to perform. METHOD: All data were collected during one season (2016-2017) with players' soccer activity recorded using 5-Hz GPS and internal load monitored using heart rate (HR). GPS and HR data were analysed during typical small-sided games and a 4-min standardized submaximal run (12 km/h)...
April 24, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29688109/power-output-and-pacing-during-international-cross-country-mountain-bike-cycling
#18
Cyril Granier, Chris R Abbiss, Anaël Aubry, Yvon Vauchez, Sylvain Dorel, Christophe Hausswirth, Yann Le Meur
PURPOSE: To characterize the physiological profiles of elite cross-country mountain bike (XCO-MTB) cyclists, and to examine their pacing and power output (PO) distribution during international races. METHODS: Over two competitive seasons, eight elite male XCO-MTB cyclists (VO2 max: 79.9 ± 5.2 ml.min-1 .kg-1 , MAP: 411 ± 18 W and 6.3 ± 0.4 W.kg-1 ) regularly undertook incremental tests to assess their PO and heart rate (HR) at first and second ventilatory thresholds (VT1 and VT2) and at VO2max ...
April 24, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29688105/sprinting-for-the-win-distribution-of-power-output-in-women-s-professional-cycling
#19
Jeremiah J Peiffer, Chris R Abbiss, Eric C Haakonssen, Paolo Menaspà
PURPOSE: This study examined the power output distribution and sprint characteristics of professional female road cyclists. METHODS: 31 race files, representing top-five finishes, were collected from seven professional female cyclists. Files were analysed for sprint characteristics including; mean and peak power output, velocity and duration. The final 20 min before the sprint was analysed to determine the mean maximal power output (MMP) consistent with 5, 15, 30, 60, 240 and 600s durations...
April 24, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29688093/impact-of-accommodating-resistance-in-potentiating-horizontal-jump-performance-in-professional-rugby-league-players
#20
Alasdair Strokosch, Loic Louit, Laurent Seitz, Richard Clarke, Jonathan D Hughes
This study investigated the efficacy of deadlifts and box squats, with a combination of traditional and accommodating resistance, as a potentiating (PAP) stimulus of standing broad jumps (SBJ) in a multiple set contrast protocol. Twelve professional rugby league players (21.4 ± 2.5yrs; 181.3 ± 8.3cm, 91.9 ± 8.8kg; 1RM back squat/BM 1.59 ± 0.21; 1RM deadlift/BM 2.11 ± 0.25; ≥3 years resistance training experience) performed baseline SBJ before a contrast PAP protocol involving 2 repetitions of 85% 1RM box squat or deadlifts, loaded with a combination of traditional barbell weight (70% 1RM) and elastic band resistance (~15% 1RM), followed by two SBJs...
April 24, 2018: International Journal of Sports Physiology and Performance
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