The effect of whole body vibration training on the muscle performance and bone mineral density in postmenopausal women with osteoporosis

Whole body vibration training (WBVT) is a training method which is used to enhance the muscle strength performance and enhance and/or protect bone mineral density (BMD) with osteoporosis individuals. Aim: The aim of this study is determine the chronic and detraining effects of the WBVT on the muscle strength and bone mineral density in postmenopausal women with osteoporosis, and, evaluate practicability of WBVT instead of traditional strength training. Material and methods: The subjects selected among the women with osteoporosis whom apply the Antalya State Hospital Outpatient Clinic of Physical Medicine and Rehabilitation. They randomly assigned to three groups as; WBVT group (n=12), strength group (n=8) and control group (n=8). TBVA and strength training were consist of dynamic and static training protocols (squat, push up, calves, lunge and front raise) and the intensity of training protocols would be 50% of the maximum repetition of individual. Frequency and amplitude of vibration was kept constant 30Hz and 2mm in respectively in the WBVT group. Both strength and vibration training programs applied for 30 minute/day, 2 days/week during six months. The outcome measures were consist of body composition (length, weight, body mass index, percent body fat, fat free mass), BMD (lumbar t score ? BMD ve femoral neck t score ? BMD), balance/agility (short physical performance tests, timed up and go tests), strength (squat, push up, calves, lunge and front raise tests), and aerobic endurance (six minute walking distance and intensity) measurements. The results will be analyzed and evaluated by using statistically tests. Statistical analysis of the data, were made using SPSS 10.0 package program. Results: Statistical analyses revealed that; in baseline measurement, participant had similar all measurement, except result of 6 min. distance. After 24-week period, there was a group differences in some strength tests (static calves, dynamic calves and static lunge) and vibration group received higher values than the control group . Conclusion: Vibration training appears to be useful in increasing the some parameters of the strength, walking speeds and balance, but no change of BMD values in postmenopausal women with osteoporosis. Preserved in the detraining process gains.Key Words :Postmenopausal women, osteoporosis, whole body vibration training, strength training, bone mineral density.