title: Effect of training in hypoxia on repeated sprint performance in female athletes.
abstract: BACKGROUND
  This study determined the effect of repeated sprint training in hypoxia (RSH) in female athletes.
  
  
  METHODS
  Thirty-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 ([Formula: see text]) were determined before and after the training period.
  
  
  RESULTS
  After 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). [Formula: see text] did not change significantly after the training period in either group.
  
  
  CONCLUSIONS
  Four weeks of RSH further enhanced the peak and mean power output during repeated sprint test compared with RSN.
authors.affiliation: Graduate School of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga Japan.
authors.forename: Nobukazu
authors.initials: N
authors.lastname: Kasai
authors.affiliation: Graduate School of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga Japan.
authors.forename: Sahiro
authors.initials: S
authors.lastname: Mizuno
authors.affiliation: Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577 Japan.
authors.forename: Sayuri
authors.initials: S
authors.lastname: Ishimoto
authors.affiliation: Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577 Japan.
authors.forename: Etsuko
authors.initials: E
authors.lastname: Sakamoto
authors.affiliation: Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577 Japan.
authors.forename: Misato
authors.initials: M
authors.lastname: Maruta
authors.affiliation: Graduate School of Sport and Health Science, Ritsumeikan University, Kusatsu, Shiga Japan ; Faculty of Sport and Health Science, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577 Japan.
authors.forename: Kazushige
authors.initials: K
authors.lastname: Goto
keywords: Anaerobic power output; Normobaric hypoxia; Repeated sprint ability; Team sport athletes