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Indexed/Abstracted in: BIOSIS Previews, EMBASE, Scopus, Emerging Sources Citation Index
Online ISSN 1827-1812
de Castro Cesar M. 1, Gomes Gonelli P. R. 1, Seber S. 1, Pellegrinotti Í. L. 1, de Lima Montebelo M. I. 2
1 Human Performance Nucleus, Physical Education Course, Health Science College, Methodist University of Piracicaba, São Paulo, Brazil;
2 Exacts and Nature Science College, Methodist University of Piracicaba, São Paulo, Brazil
Background. The aim of this study was to compare metabolic and cardiorespiratory responses to treadmill walking and running at the same speed in men.
Methods. Ten young male were included in the study. They underwent two submaximal cardiopulmonary treadmill exercise tests at a constant speed of 7.0 km/h, one walking and the other running, on separate days.
Results. The following variables were found to be higher during running than walking, respectively: energy expenditure 614.9±73.5 kcal/h, 525.5±100.7 kcal/h; oxygen uptake 2.09±0.24 L/min, 1,79±0,31 L/min; carbon dioxide output 1.84±0.22 L/min, 1.57±0.29 L/min; heart rate 143.2±11.1 bpm, 133.2±16.1 bpm; oxygen pulse 14.7±2.4 mL/beat, 13.5±2,3 mL/beat; pulmonary ventilation 52.4±6.3 L/min, 45.3±7.5 L/min. No significant differences were found between walking and running, respectively, for: ventilatory equivalents for oxygen 25.5±2.3; 25.1±1,4 ; ventilatory equivalents for carbon dioxide 29.1±2,2; 28.5±2.0; respiratory quotient 0.87±0.04; 0.88±0.04. Rating of perceived exertion was greater in walking (11.2±2.0) than in running (10.5±1.6).
Conclusions. Our results indicate that, at 7.0 km/h, running is associated with greater energy expenditure and reduced subjective perception of exertion than walking. At this speed, therefore, running is more indicated than walking for improving cardiorespiratory capacity and body composition.