VO2 Prediction and Cardiorespiratory Responses During Underwater Treadmill Exercise
Authors: Greene, Nicholas P.; Greene, Elizabeth S.; Carbuhn, Aaron F.; Green, John S.; Crouse, Stephen F.
Source: Research Quarterly for Exercise and Sport, 1 June 2011, vol. 82, no. 2, pp. 264-273(10)
Abstract:We compared cardiorespiratory responses to exercise on an underwater treadmill (UTM) and land treadmill (LTM) and derived an equation to estimate oxygen consumption (VO2) during UTM exercise. Fifty-five men and women completed one LTM and five UTM exercise sessions on separate days. The UTM sessions consisted of chest-deep immersion, with 0, 25, 50, 75, and 100% water-jet resistance. All session treadmill velocities increased every 3 min from 53.6 to 187.8 m·min-1. Cardiorespiratory responses were similar between LTM and UTM when jet resistance for UTM was ≥ 50%. Using multiple regression analysis, weight-relative VO2 could be estimated as: VO2 (mLO2·kg-1·min-1) = 0.19248· height (cm) + 0.17422· jet resistance (% max) + 0.14092 · velocity (m·min-1) - 0.12794 · weight (kg) – 27.82849, R2 = .82. Our data indicate that similar LTM and UTM cardiorespiratory responses are achievable, and we provide a reasonable estimate of UTM VO2.
Document Type: Research Article