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KMID : 0613820030130010021
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Journal of Life Science
2003 Volume.13 No. 1 p.21 ~ p.28
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Analysis of Energy Expenditure during walking and running by % body fat in obese women
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Yoon Jin-Hwan
Lee Hee-Hyuk
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Abstract
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The purpose of this experiment was to compare the energy expenditure and the physiological response among two groups by percent body fat(group A: 30-35%body fat, B: 35-40%body fat) to walking and running at several equivalnet speeds. Subjects in group A and B followed A group(mean∂SD, age; 24.0∂0.4yrs, body fat; 32.3∂0.7), and B group (age; 25.2∂0.7yrs, body fat; 36.7∂0.9). The walking and running protocol consisted of treadmill speeds for five min at each of the follwing speeds: 5.0, 5.5, 6.0, 6.5, 7.0 km；hr-1. The obtained data reveal In group A, the rate of oxygen
consumption and energy expenditure was higher during walking compared to running ate treadmill speeds .6.6km； hr-1. In group B, the rate of oxygen consumption and energy expenditure was higher during walking compared to running ate treadmill speeds .6.8km；hr-1. Heart rates and respiratory exchange ratio were higher at treadmill speeds .5.8 in group A and .5.5 in group B. these findings demonstrated that a difference of percent body fat in obese women have no large effect on energy efficiency of walking, but walking within speeds 6.5~7.0km/hr resulted in rates of energy expenditure that were as high or higher than jogging at the same speeds even though the relative stress was greater during walking.
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KEYWORD
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Walking, Running, Oxygen consumption, Heart rates
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