Physiological responses to incremental, interval, and continuous counterweighted single-leg and double-leg cycling at the same relative intensities

European Journal of Applied Physiology
Martin J MacInnisMartin J Gibala

Abstract

We compared physiological responses to incremental, interval, and continuous counterweighted single-leg and double-leg cycling at the same relative intensities. The primary hypothesis was that the counterweight method would elicit greater normalized power (i.e., power/active leg), greater electromyography (EMG) responses, and lower cardiorespiratory demand. Graded-exercise tests performed by 12 men (age: 21 ± 2 years; BMI: 24 ± 3 kg/m2) initially established that peak oxygen uptake ([Formula: see text]; 76 ± 8.4%), expired ventilation ([Formula: see text]; 71 ± 6.8%), carbon dioxide production ([Formula: see text]; 71 ± 6.8%), heart rate (HRpeak; 91 ± 5.3%), and power output (PPO; 56 ± 3.6%) were lower during single-leg compared to double-leg cycling (main effect of mode; p < 0.05). On separate days, participants performed four experimental trials, which involved 30-min bouts of either continuous (50% PPO) or interval exercise [4 × (5-min 65% PPO + 2.5 min 20% PPO)] in a single- or double-leg manner. Double-leg interval and continuous cycling were performed at greater absolute power outputs but lower normalized power outputs compared to single-leg cycling (p < 0.001). The average EMG responses from the vastus lateralis and vast...Continue Reading

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Citations

Jan 13, 2018·Medicine and Science in Sports and Exercise·Nicole GordonJeremiah J Peiffer
Oct 17, 2019·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Martin J MacInnisMartin J Gibala
Jan 30, 2020·Journal of Sports Sciences·Pierros ThomakosPanagiotis Behrakis
May 31, 2019·Medicine and Science in Sports and Exercise·Nicole GordonJeremiah J Peiffer
Feb 23, 2020·Scandinavian Journal of Medicine & Science in Sports·Trevor J StaplesJames C Martin
Oct 17, 2019·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Danilo IannettaJuan M Murias
Jul 1, 2021·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Jenny ZhangSaied J Aboodarda
Jul 29, 2021·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Alessio Del TortoStefano Lazzer

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