Changes in running performance after four weeks of interval hypoxic training in Australian footballers

A single-blind placebo-controlled study

Blake D. McLean, Paul J. Tofari, Christopher J. Gore, Justin G. Kemp

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

There is a paucity of data examining the impact of high-intensity interval hypoxic training (IHT) on intermittent running performance. This study assessed the effects of IHT on 17 amateur Australian Footballers, who completed 8 interval treadmill running sessions (IHT [F I O 2 15.1%] or PLACEBO) over 4 weeks, in addition to normoxic football (2 per week) and resistance (2 per week) training sessions. To match relative training intensity, absolute IHT intensity reduced by 6% of normoxic vVo 2 peak compared with PLACEBO. Before and after the intervention, performance was assessed by Yo-Yo intermittent recovery test level 2 (Yo-Yo IR2) and a self-paced team sport running protocol. Standardized effect size statistics were calculated using Cohen's d to compare between the interventions. Compared with PLACEBO, IHT subjects experienced (a) smaller improvements in Yo-Yo IR2 performance (Cohen's d -0.42 [-0.82 to -0.02; 90% confidence interval]); (b) similar increases in high-intensity running distance during the team sport protocol (d 0.17 [-0.50 to 0.84]); and (c) greater improvements in total distance (d 0.72 [0.33-1.10]) and distance covered during low-intensity activity (d 0.59 [-0.07 to 1.11]) during the team sport protocol. The lower absolute training intensity of IHT may explain the smaller improvements in Yo-Yo IR2 performance in the hypoxic group. Conversely, the data from the self-paced protocol suggest that IHT may positively influence pacing strategies in team sport athletes. In conclusion, IHT alters pacing strategies in team sport athletes (i.e., increased distance covered during low-intensity activity). However, IHT leads to smaller improvements in externally paced high-intensity intermittent running performance (i.e., Yo-Yo IR2), which may be related to a reduced absolute training intensity during IHT sessions.

Original languageEnglish
Pages (from-to)3206-3215
Number of pages10
JournalJournal of Strength and Conditioning Research
Volume29
Issue number11
DOIs
Publication statusPublished - 1 Nov 2015
Externally publishedYes

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Running
Sports
Placebos
Athletes
Football
Confidence Intervals

Cite this

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title = "Changes in running performance after four weeks of interval hypoxic training in Australian footballers: A single-blind placebo-controlled study",
abstract = "There is a paucity of data examining the impact of high-intensity interval hypoxic training (IHT) on intermittent running performance. This study assessed the effects of IHT on 17 amateur Australian Footballers, who completed 8 interval treadmill running sessions (IHT [F I O 2 15.1{\%}] or PLACEBO) over 4 weeks, in addition to normoxic football (2 per week) and resistance (2 per week) training sessions. To match relative training intensity, absolute IHT intensity reduced by 6{\%} of normoxic vVo 2 peak compared with PLACEBO. Before and after the intervention, performance was assessed by Yo-Yo intermittent recovery test level 2 (Yo-Yo IR2) and a self-paced team sport running protocol. Standardized effect size statistics were calculated using Cohen's d to compare between the interventions. Compared with PLACEBO, IHT subjects experienced (a) smaller improvements in Yo-Yo IR2 performance (Cohen's d -0.42 [-0.82 to -0.02; 90{\%} confidence interval]); (b) similar increases in high-intensity running distance during the team sport protocol (d 0.17 [-0.50 to 0.84]); and (c) greater improvements in total distance (d 0.72 [0.33-1.10]) and distance covered during low-intensity activity (d 0.59 [-0.07 to 1.11]) during the team sport protocol. The lower absolute training intensity of IHT may explain the smaller improvements in Yo-Yo IR2 performance in the hypoxic group. Conversely, the data from the self-paced protocol suggest that IHT may positively influence pacing strategies in team sport athletes. In conclusion, IHT alters pacing strategies in team sport athletes (i.e., increased distance covered during low-intensity activity). However, IHT leads to smaller improvements in externally paced high-intensity intermittent running performance (i.e., Yo-Yo IR2), which may be related to a reduced absolute training intensity during IHT sessions.",
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Changes in running performance after four weeks of interval hypoxic training in Australian footballers : A single-blind placebo-controlled study. / McLean, Blake D.; Tofari, Paul J.; Gore, Christopher J.; Kemp, Justin G.

In: Journal of Strength and Conditioning Research, Vol. 29, No. 11, 01.11.2015, p. 3206-3215.

Research output: Contribution to journalArticle

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