Energy Cost of Walking in Boys Who Differ in Adiposity But Are Matched for Body Mass

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Abstract
To compare the energy cost of treadmill walking, in pairs of obese and lean adolescents who were matched for total body mass. Metabolic energy expenditure was determined at 67, 83, and 100 m·min−1, in nine obese and nine nonobese 11- to 18-yr-old boys. Total adiposity and fat distribution in the trunk and limbs were assessed using DXA. There were no intergroup differences in the net (exercise minus rest) energy cost at the two lower speeds, but the obese boys expended more energy at 100 m·min−1 (12%, P Conclusion It is total body mass, more than adiposity (total and regional) per se, that affects the energy cost of locomotion in obese boys.