Training Using Single Versus Multiple Intermittent Bouts Of High-intensity Exercise Training Are Equally Effective For Increasing Maximal Oxygen Uptake

In the present study, we measured changes in health status markers after 10 wk of training using an established, efficacious high-intensity interval training protocol [4 x 4 min at 90% of maximal heart rate (HRmax) interspersed with 3 min active recovery at 70% HRmax; 4-BOUT], or a novel single bout...

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Published in:Medicine and science in sports and exercise 2012-05, Vol.44 (5S), p.537-537
Main Authors: Tjonna, Arnt E, Leinan, Ingeborg M, Bartnes, Anette T, Jenssen, Bjorn M, Winett, Richard A, Gibala, Martin, Wisloff, Ulrik
Format: Article
Language:English
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Summary:In the present study, we measured changes in health status markers after 10 wk of training using an established, efficacious high-intensity interval training protocol [4 x 4 min at 90% of maximal heart rate (HRmax) interspersed with 3 min active recovery at 70% HRmax; 4-BOUT], or a novel single bout protocol that requires a markedly lower time commitment (1 x 4 min at 90% HRmax; 1 BOUT). Twenty six healthy, sedentary overweight men (BMI: 25-30, age: 35-45 y) were randomized to either 1-BOUT (n=13) or 4-BOUT (n=13). After 10 wk of training, VO2max increased by 10% (~5.0 mL*kg-1*min-1) and 13% (~6.5 mL*kg-1*min-1) in 1-BOUT and 4-BOUT, respectively, with no group difference (P=0.22). Work economy also improved in both groups after training, as evidenced by lower oxygen cost during running at a sub-maximal work load (14% and 13%, respectively, in 1-BOUT and 4-BOUT; with no group difference P=0.40).
ISSN:0195-9131