Changes in running performance after four weeks of interval training in Australian Footballers : A single-blind placebo-controlled study

Journal article


McLean, Blake, Tofari, Paul, Gore, Christopher and Kemp, Justin. (2015). Changes in running performance after four weeks of interval training in Australian Footballers : A single-blind placebo-controlled study. Journal of Strength and Conditioning Research. 29(11), pp. 3206 - 3215. https://doi.org/10.1519/JSC.0000000000000984
AuthorsMcLean, Blake, Tofari, Paul, Gore, Christopher and Kemp, Justin
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 [FIO2 = 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 vV[Combining Dot Above]O2peak 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.

Year2015
JournalJournal of Strength and Conditioning Research
Journal citation29 (11), pp. 3206 - 3215
ISSN1064-8011
Digital Object Identifier (DOI)https://doi.org/10.1519/JSC.0000000000000984
Page range3206 - 3215
Research GroupSports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre
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File Access Level
Controlled
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