3.4 Effects of Whole Body Vibration and resistance training on bone mineral density and anthropometry in obese postmenopausal women

Journal: Journal of Osteoporosis, 2014: 1-6

Study Context: One aspect of health that is particularly important for post-menopausal women is that of bone mineral density. We know that physical exercise is helpful for bone mineral density but vigorous weight bearing exercise can also increase the risk of injuries. Since recent evidence shows that low levels of mechanical vibration can be strongly anabolic, and if these mechanical signals can reach the areas of the skeleton at greatest risk of osteoporosis such as the hip and lumbar spine, then vibration exercise could be used as a unique, non-pharmacological intervention to prevent or reverse bone loss.

This Egyptian study divided 80 women (ages 50 – 68 years) with high body mass indices (BMI 30-36 kg/m2) into two groups: one group performed weight bearing exercise 3 times per week for 8 months while the second group performed Whole Body Vibration exercises 3 times per week for 8 months.

Both groups significantly improved their bone mineral density after the 8 months of exercise and both groups improved their body mass indices and waist to hip ratios. The highest values of R2 were found for the models incorporating vibration exercise plus BMI

Comments: The vibration training group spent a total of 20 minutes training of which 10 minutes was on the machine and 10 minutes were in rest intervals. The weight training group spent one hour in the gym exercises and the exercises were not the same ones used in the vibration training group. The researchers noted that the long training times such as those used in the non-training group are one reason that compliance is often low and that similar gains were made in a shorter period of time with vibration exercise.