Abstract
Purpose Whole-body vibration (WBV) is new type of exercise that is being increasingly performed to prevent bone fractures and osteoporosis in frail people. Whether WBV plays an important role in positive skeletal responses of premenopausal women is controversial. The aim of this study was to determine the effects of 6 months of supervised WBV and high-impact aerobics (HIA) on bone metabolism and body balance in pre-menopausal women. Methods Sixty-seven eligible premenopausal women were stratified into three groups: the WBV training group (n = 23), HIA training group (n = 22), and control group (n = 22). The subjects in both training groups participated in a supervised training program involving three sets of 3-minute exercise sessions three times a week for 6 months. The WBV group received vibration in a static standing position. The HIA group jumped rope. Bone-related factors and body balance were compared at baseline and 6-month intervals. Results Comparison of the percent changes of the variables showed that WBV and HIA at the stimulus level of the current study had no superior effect on the bone metabolism of healthy premenopausal women compared with controls. However, comparison of the absolute changes between baseline and the 6-month intervention showed a couple of positive findings in all groups. Conclusions Our data suggest that higher exposures of isolated WBV than those used in the current study or WBV plus various types of HIA training might be needed to improve the bone metabolism and body balance in premenopausal women.
Highlights
Maintaining an optimal body composition, including optimal Bone Mineral Density (BMD) levels, muscle strength, and muscle volume, during the premenopausal years is important to reduce the risk of osteoporosis and subsequent fractures during the postmenopausal years
Whole-body vibration (WBV), defined as exercise performed with the body in contact with a vibrating platform, is new type of exercise that has been increasingly performed to prevent bone fractures and osteoporosis mainly in frail people [2,3,4,5,6,7,8,9,10,11,12,13,14]
WBV can be separated into two training stimuli: the reflex muscle contraction induced by vibration, and the body-weight exercise performed on the platform
Summary
Maintaining an optimal body composition, including optimal Bone Mineral Density (BMD) levels, muscle strength, and muscle volume, during the premenopausal years is important to reduce the risk of osteoporosis and subsequent fractures during the postmenopausal years. One potentially effective lifestyle approach for achieving this goal is exercise, which is a low-cost, nonpharmacologic intervention that is available to the vast majority of the population. Whole-body vibration (WBV), defined as exercise performed with the body in contact with a vibrating platform, is new type of exercise that has been increasingly performed to prevent bone fractures and osteoporosis mainly in frail people [2,3,4,5,6,7,8,9,10,11,12,13,14]. WBV at 25–45 Hz appears to be a safe and effective mode of enhancing muscular strength in variety of populations [3]
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