The effects of a vibration and a strength-training program on bone density of postmenopausal women
Abstract
The positive effect of strength and vibration training programs on the human body has been a subject of much research, however, the effects of these programs on bone density in postmenopausal women is conflicting. The purpose of this study was to investigate the effects of a vibration exercise program and a strength-training program on bone mineral density of postmenopausal women. The research involved 48 women aged 58±4 years, who were randomly assigned to three groups: 16 vibration training group, 16 strength training group and 16 participated only in the measurements as control group. Both groups exercised for 6 months, three times a week. Bone mineral density was assessed by the measurement instrument Lunar Achilles Plus, before and after the implementation of training programs. Statistical analysis of variance 3 (group) x 2 (measurement) for repeated measures was conducted to the variable "time measuring time" to find possible differences between groups before and after intervention. Statistically significant differences were found in bone density after application of training programs for both groups, p<0.001 (strength training group: 1st measure -1,788, 2nd measure -1,581 / vibration training group: 1st measure -1.819, 2nd measure -1,463). A difference in efficacy between the two programs (vibration- strength) was also found (reduced bone density value), but it was not statistically significant p=0.809. In conclusion, the execution strength exercises during strength training programs and programs with a vibrating platform can improve bone mineral density of postmenopausal women, and better response was found in improving bone density with the vibration program.References
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