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Movement characteristics, physiological and perceptual responses of elite standard youth football players to different high intensity running drills

Movement characteristics, physiological and perceptual responses of elite standard youth football... Purpose: To examine responses to high intensity running drills in youth football players.Methods: Seventeen players completed the YoYo Intermittent Recovery test level one (YYIR1) and a 15 m maximal sprint to quantify target running speeds. Players performed three conditions on separate occasions comprising: 12 × 15 s high intensity runs at 100% of the final YYIRT1 speed, 12 × ~ 4 s repeated sprints with ~26 s recovery, and combination running using both modalities. Heart rate was monitored continuously with PlayerLoadTM and movement characteristics using microtechnology. Ratings of perceived exertion and blood lactate responses were measured 2 min after the final repetition. The ratio of Flight:contraction time was calculated from a countermovement jump before and at 2 min and 14 h after each condition. Data analysis used magnitude based inferences and effect sizes statistics.Results: Peak speed (1.1%; ES 0.23 ± 0.44) and mean speed over the initial 4 s (6.3%; ES 0.45 ± 0.46) were possibly faster during combination compared to high intensity running with unclear differences compared to repeated sprinting. This was despite most likely (21.6%; ES 7.65 ± 1.02) differences in prescribed speeds between conditions. There were likely reductions in F:C at 14 h ratio after high intensity (−5.6%; ES – 0.44 ± 0.32) and combination running (−6.8%; ES −0.53 ± 0.47). Changes in the repeated sprinting condition were unclear.Conclusions: Actual movement characteristics of high intensity running drills may not reflect those used to prescribe them whilst reductions in F:C ratio are evident 14 h after their completion. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Science and Medicine in Football Taylor & Francis

Movement characteristics, physiological and perceptual responses of elite standard youth football players to different high intensity running drills

Movement characteristics, physiological and perceptual responses of elite standard youth football players to different high intensity running drills

Science and Medicine in Football , Volume 2 (4): 7 – Oct 2, 2018

Abstract

Purpose: To examine responses to high intensity running drills in youth football players.Methods: Seventeen players completed the YoYo Intermittent Recovery test level one (YYIR1) and a 15 m maximal sprint to quantify target running speeds. Players performed three conditions on separate occasions comprising: 12 × 15 s high intensity runs at 100% of the final YYIRT1 speed, 12 × ~ 4 s repeated sprints with ~26 s recovery, and combination running using both modalities. Heart rate was monitored continuously with PlayerLoadTM and movement characteristics using microtechnology. Ratings of perceived exertion and blood lactate responses were measured 2 min after the final repetition. The ratio of Flight:contraction time was calculated from a countermovement jump before and at 2 min and 14 h after each condition. Data analysis used magnitude based inferences and effect sizes statistics.Results: Peak speed (1.1%; ES 0.23 ± 0.44) and mean speed over the initial 4 s (6.3%; ES 0.45 ± 0.46) were possibly faster during combination compared to high intensity running with unclear differences compared to repeated sprinting. This was despite most likely (21.6%; ES 7.65 ± 1.02) differences in prescribed speeds between conditions. There were likely reductions in F:C at 14 h ratio after high intensity (−5.6%; ES – 0.44 ± 0.32) and combination running (−6.8%; ES −0.53 ± 0.47). Changes in the repeated sprinting condition were unclear.Conclusions: Actual movement characteristics of high intensity running drills may not reflect those used to prescribe them whilst reductions in F:C ratio are evident 14 h after their completion.

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References (40)

Publisher
Taylor & Francis
Copyright
© 2018 Informa UK Limited, trading as Taylor & Francis Group
ISSN
2473-4446
eISSN
2473-3938
DOI
10.1080/24733938.2018.1461235
Publisher site
See Article on Publisher Site

Abstract

Purpose: To examine responses to high intensity running drills in youth football players.Methods: Seventeen players completed the YoYo Intermittent Recovery test level one (YYIR1) and a 15 m maximal sprint to quantify target running speeds. Players performed three conditions on separate occasions comprising: 12 × 15 s high intensity runs at 100% of the final YYIRT1 speed, 12 × ~ 4 s repeated sprints with ~26 s recovery, and combination running using both modalities. Heart rate was monitored continuously with PlayerLoadTM and movement characteristics using microtechnology. Ratings of perceived exertion and blood lactate responses were measured 2 min after the final repetition. The ratio of Flight:contraction time was calculated from a countermovement jump before and at 2 min and 14 h after each condition. Data analysis used magnitude based inferences and effect sizes statistics.Results: Peak speed (1.1%; ES 0.23 ± 0.44) and mean speed over the initial 4 s (6.3%; ES 0.45 ± 0.46) were possibly faster during combination compared to high intensity running with unclear differences compared to repeated sprinting. This was despite most likely (21.6%; ES 7.65 ± 1.02) differences in prescribed speeds between conditions. There were likely reductions in F:C at 14 h ratio after high intensity (−5.6%; ES – 0.44 ± 0.32) and combination running (−6.8%; ES −0.53 ± 0.47). Changes in the repeated sprinting condition were unclear.Conclusions: Actual movement characteristics of high intensity running drills may not reflect those used to prescribe them whilst reductions in F:C ratio are evident 14 h after their completion.

Journal

Science and Medicine in FootballTaylor & Francis

Published: Oct 2, 2018

Keywords: Football; interval training; youth; acute responses

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