Abstract:
The purpose of this research was to develop a circuit box jumping exercise program and examine the effect of circuit box jumping exercise program on bone formation, bone resorption, health related physical fitness and balance of premenopausal women. The samples consisting of 57 female volunteers from Chulalongkorn University aged between 35-45 years. Subjects were divided into two groups with 28 female in the training group and 29 female in the control group by simple random sampling method. The training group participated in a circuit box jumping exercise program while wearing heart rate monitor. The exercise speed was determined by the rhythm of the music. The training group completed two circuits of jumping on 6 stations with 10 jumps per station three times per week, for a period of twelve weeks. The jumping box is 10, 15 and 20 centimeters in height. The intensity was 60%-80% of the maximum heart rate. The control group did not participate in the circuit box jumping exercise program. The data were collected before and after the experiment. The collected data were physiological data, biochemical bone marker, health related physical fitness and balance ability. The data were collected before and after the experiment and were compared and analyzed by paired samples t-test and independent samples t-test. The differences of the test were statistically significant at the .05 level. Results of the study were shown as follow;1. Biochemical bone marker in the circuit box jumping subjects after the training intervention was significantly lower in bone resorption (ß-Crosslaps) while bone formation was significantly higher after the training intervention (p<.05).2. Health-related physical fitness and balance in the circuit box jumping subjects after the training intervention was significantly better after the training intervention (p<.05).The circuit box jumping training had positive effect on slowing down the bone resorption which resulting in increasing the bone formation. It may be concluded that the circuit box jumping training could reduce the risk of osteoporosis in premenopausal women. Additionally, it promoted the better health-related physical fitness and balance.