Effects of Repeated-Sprint Training in Hypoxia on Tennis-Specific Performance in Well-Trained Players.

Sports medicine international open Pub Date : 2018-09-25 eCollection Date: 2018-09-01 DOI:10.1055/a-0719-4797
Cyril Brechbuhl, Franck Brocherie, Gregoire P Millet, Laurent Schmitt
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引用次数: 21

Abstract

This study examined the physiological, physical and technical responses to repeated-sprint training in normobaric hypoxia [RSH, inspired fraction of oxygen (FiO 2 ) 14.5%] vs. normoxia (RSN, FiO 2 20.9%). Within 12 days, eighteen well-trained tennis players (RSH, n=9 vs. RSN, n=9) completed five specific repeated-sprint sessions that consisted of four sets of 5 maximal shuttle-run sprints. Testing sessions included repeated-sprint ability and Test to Exhaustion Specific to Tennis (TEST). TEST's maximal duration to exhaustion and time to attain the 'onset of blood lactate accumulation' at 4 mMol.L -1 (OBLA) improvements were significantly higher in RSH compared to RSN. Change in time to attain OBLA was concomitant with observations similar in time to the second ventilatory threshold. Significant interaction (P=0.003) was found for ball accuracy with greater increase in RSH (+13.8%, P=0.013) vs. RSN (-4.6%, P=0.15). A correlation (r=0.59, P<0.001) was observed between change in ball accuracy and TEST's time to exhaustion. Greater improvement in some tennis-specific physical and technical parameters was observed after only 5 sessions of RSH vs. RSN in well-trained tennis players.

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低氧条件下重复冲刺训练对训练有素运动员网球专项表现的影响。
本研究考察了在常氧低[RSH,吸入氧分数(fio2) 14.5%]和常氧低(RSN, fio2 20.9%)条件下重复短跑训练的生理、物理和技术反应。在12天内,18名训练有素的网球运动员(RSH, n=9 vs RSN, n=9)完成了5次特定的重复冲刺训练,包括4组5次最大的穿梭跑冲刺。测试阶段包括重复冲刺能力和网球疲劳测试(Test)。TEST到精疲力竭的最大持续时间和达到“血乳酸积累开始”为4mmol的时间。与RSN相比,RSH的L -1 (OBLA)改善明显更高。达到OBLA的时间变化伴随着与第二次通气阈值相似的时间观察。与RSH (-4.6%, P=0.15)相比,RSH (+13.8%, P=0.013)和RSN (-4.6%, P=0.15)的准确率有显著的相互作用(P=0.003)。相关性(r=0.59, P
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