| Objective:To investigate the effect of aerobic exercise with different intensity on bone mineral density (BMD) and body composition in elderly male people. Methods: Ninety healthy elderly male people were randomly divided into low-intensity A, moderate-intensity B, and high-intensity C groups with 30 cases in each group. According to each person's maximal heart rate in a restrictive electrocardiogram exercise test to make exercise intensity, groups A, B, and C performed aerobic exercise at 50%, 70%, and 90% of heart rate reserve respectively. Three groups were treated by medical treadmill (monitor heart rate at any time) running training. The movement time of each group reached 30 min on the target heart rate, three times per week at least for 6 months. BMD, waist-hip ratio (WHR) and body fat rate (BFR) were recorded and analyzed before and after training. Results: BMD of three groups was significantly increased after training (P<0.05), while WHR and BFR were significantly decreased (P<0.05). Moreover, as compared with the low-intensity group, there were significant differences in BMD, WHR and BFR in the high-intensity group or moderate-intensity group (P<0.05), but there was no significant difference between high-intensity group and moderate-intensity group (P>0.05). Conclusion：The high-intensity and moderate-intensity aerobic exercise can significantly improve BMD and BFR in elderly male people, but the effects of the moderate-intensity training and high-intensity training on BMD and body composition have no significant difference. We suggest that the moderate-intensity strength of aerobic exercise is used in elderly people to improve BMD and body composition. |
