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n African Journal for Physical Health Education, Recreation and Dance - A single session of brisk walking does not alter blood glucose homeostasis in overweight young men : sport and physical activity

Volume 14, Issue 3
  • ISSN : 1117-4315

Abstract

Aerobic exercise can enhance insulin sensitivity, glucose tolerance and collectively, blood glucose homeostasis. Moreover, many different exercise intensities and durations have been used to enhance blood glucose homeostasis. However, the minimum duration of moderate intensity exercise necessary to elicit improved blood glucose homeostasis is unknown. Six sedentary, apparently healthy, overweight (24.5 ± 1.2 percentage body fat), young males (21.7 ± 1.0 years) underwent a 75 gramme oral glucose challenge at baseline and at 24 hours after a single session of moderate exercise. The exercise intervention consisted of treadmill walking at an intensity of 50% of maximal aerobic capacity (VOmax) for 10, 20, 40, or 60 minutes, and each subject engaged in each duration in a randomly ordered manner separated by seven days. Areas under the curve were not different between baseline, 10 minutes, 20 minutes, 40 minutes, or 60 minutes of exercise for glucose (324.9 ± 113.0, 428.1 ± 114.3, 327.5 ± 66.5, 982.6 ± 168.6, 345.5 ± 108.2 mmol.l-1.min-1, respectively) and insulin (56028.5 ± 15604.5, 66980.0 ± 21091.4, 65492.3 ± 15394.6, 60214.9 ± 18130.8, 65829.5 ± 11965.6 pmol.l-1.min-1, respectively). Therefore, it appears that a single session of moderate intensity aerobic exercise lasting from 10 to 60 minutes does not appear to be sufficient to elicit changes in glucose tolerance or insulin sensitivity in sedentary, apparently healthy, overweight college-aged males.

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/content/ajpherd/14/3/EJC19538
2008-09-01
2020-11-28

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