The Oxidative Contribution Of Eight Repeat Bouts Of High Intensity Interval Training

Abstract

The oxidative contribution to eight repeat bouts of high intensity interval training John Petrizzo, Michele Aquino, Colin Shaw, Justin St Peter, Erica Koutch, Rebecca Flax, Kerianne Nordland, John Wygand, FACSM, Robert Otto, FACSM, Adelphi University, Garden City, NY 11530. Email: [email protected] Interval training requires bouts of work followed by recovery intervals. The intensity of the work interval impacts the metabolic response of the recovery interval. PURPOSE: The purpose was to determine the oxidative cost of both the work (W) interval and the recovery (R) interval during 8 continuous repetitions of high intensity interval training (HIIT) at a workload equivalent to 100% Max VO2. METHODS: All 20 second work intervals were followed by recovery intervals of 10, 20, 30 and 40 sec at 20% of Max VO2. 14 recreationally active college-age students (age: 21.6±1.1 yrs., height: 171.41±0.5 cm, body mass: 75.0±10.6 kg, max VO2 2.89±.67, 8 ♂) volunteered to participate in a randomized, single-blind crossover design study with a minimum of 4 days between trials. A max VO2 ramp protocol on a Lode Cycle ergometer preceded the HIIT trials and established the max workload. VO2 was obtained by continuous open circuit spirometry. RESULTS: Statistical analysis by ANOVA with repeated measures (∗P<.05) was applied to these data.CONCLUSION: Short recovery intervals of 30 seconds or less provide the greatest oxidative stress during interval training, which may be attributed to insufficient phosphagen resynthesis during recovery.