Effect of training in hypoxia on repeated sprint performance in female athletes.

Kazushige Goto,Sahiro Mizuno,Sayuri Ishimoto,Nobukazu Kasai,Misato Maruta,Etsuko Sakamoto

doi:10.1186/s40064-015-1041-4

Kazushige Goto, Sahiro Mizuno + Show 4 more

Open Access

https://doi.org/10.1186/s40064-015-1041-4

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Journal: SpringerPlus	Publication Date: Jul 2, 2015
Citations: 67	License type: CC BY 4.0

Affiliation: Ritsumeikan University

Abstract

BackgroundThis study determined the effect of repeated sprint training in hypoxia (RSH) in female athletes.MethodsThirty-two college female athletes performed repeated cycling sprints of two sets of 10 × 7-s sprints with a 30-s rest between sprints twice per week for 4 weeks under either normoxic conditions (RSN group; FiO2, 20.9%; n = 16) or hypoxic conditions (RSH group; FiO2, 14.5%; n = 16). The repeated sprint ability (10 × 7-s sprints) and maximal oxygen uptake ( dot{text{V}}{text{O}}_{2hbox{max} } ) were determined before and after the training period.ResultsAfter training, when compared to pre-values, the mean power output was higher in all sprints during the repeated sprint test in the RSH group but only for the second half of the sprints in the RSN group (P ≤ 0.05). The percentage increases in peak and mean power output between before and after the training period were significantly greater in the RSH group than in the RSN group (peak power output, 5.0 ± 0.7% vs. 1.5 ± 0.9%, respectively; mean power output, 9.7 ± 0.9% vs. 6.0 ± 0.8%, respectively; P < 0.05). dot{text{V}}{text{O}}_{2hbox{max} } did not change significantly after the training period in either group.ConclusionFour weeks of RSH further enhanced the peak and mean power output during repeated sprint test compared with RSN.

Highlights

This study determined the effect of repeated sprint training in hypoxia (RSH) in female athletes
Physiological and performance variables during the training period The average values of SpO2 during all training sessions were significantly lower in the RSH group (92.5 ± 0.3%) than in the repeated sprint training in normoxia (RSN) group (97.7 ± 0.4%, P < 0.05)
During sessions 3, 4, and 6–8, the relative values of the peak power output were significantly higher in the RSH group than in the RSN group (P < 0.05)

Summary

Introduction

This study determined the effect of repeated sprint training in hypoxia (RSH) in female athletes. Growing evidence suggests that training in hypoxia improves anaerobic or repeated sprints performance (Mizuno et al 1990; Hamlin et al 2010; Faiss et al 2013a, 2015; Gatterer et al 2014). Team sports such as football, hockey, and basketball require athletes to perform a number of short sprints separated by periods of rest or low-to-moderate–intensity exercise (Bishop and Edge 2006). Recent studies have focused on the influences of repeated sprint training in hypoxia (RSH) on repeated sprint ability (Faiss et al 2013a; Galvin et al 2013; Millet et al 2013; Gatterer et al 2014). Faiss et al (2013a) showed that 4 weeks of RSH further increased the number of sets until fatigue during a repeated sprint test (repeated 10-s maximal sprints with 20-s active recovery until exhaustion) compared with

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