Analysis Of The Effect Of Different Exercise Intensities On Blood Glucose

Abstract

PURPOSE: To examine the changes in blood glucose(GLu) before and after different intensities-based exercise interventions in healthy university students, and provide a reference for the development of precise exercise prescriptions. METHODS: Nine healthy male college students without regular exercise habits were recruited. using a power bike (Monark 839E) with built-in Astrand to test VO2max and then to formulate 70%, 80%, and 90% VO2max intensities. Before each experiment, a high degree of consistency in each subject's meal was ensured. Exercise intervention was performed at 40 min postprandial (one week interval between each exercise intervention). First, fasting Plasma Glucose(FPG)was tested, then GLu was tested before exercise, and instant, 30 min, 60 min, and 120 min after exercise. RESULTS: (1) 40 min postprandial, instant after exercise and 60 min after exercise compared with FPG for the three intensities (P < 0.05), but not significant for 60 min after exercise at 80% VO2max intensity (p > 0.05). (2) 30 min and 60 min after exercise compared with immediate after exercise GLu (P < 0.01); 120 min after exercise (P < 0.05), but not significant at 70% VO2max intensity 120 min after exercise(p > 0.05). (3) There was no significant difference (p > 0.05) between the time points of the three intensities and the interaction measurements of exercise intensity, which proved that the changes in GLu under the three intensity exercise interventions were basically in the same direction. GLu changes within 120 min after different intensity exercise were consistent, i.e. GLu decreased instant after exercise, increased 30 min after exercise, and then decreased with time. But, there was no significant difference (p > 0.05) among the various time points of the changes in GLu for 70%, 80% and 90% VO2max exercise. CONCLUSIONS: (1) GLu changes in a similar trend, first decreased, increased and then decreased after different exercise intensities. (2) There is a certain trend of GLu changing with exercise intensity after exercise, that is, the greater the intensity of exercise, the more obvious the GLu drop after exercise, but there is no statistical significance, but there is a trend that the greater the intensity of intervention exercise, the more obvious the GLu drop.