VO2 Prediction and Cardiorespiratory Responses During Underwater Treadmill Exercise

• Autores: Nicholas P. Greene, Elizabeth S. Greene, Aaron F. Carbuhn, John S. Green, Stephen F. Crouse
• Localización: Research quarterly for exercise and sport, ISSN 0270-1367, Vol. 82, Nº. 2, 2011, págs. 264-273
• Idioma: inglés
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• Resumen

  • 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.