Whole-body vibration mimics the metabolic effects of exercise in male leptin receptor deficient mice.
Endocrinology. 2017 Mar 15. Epub 2017 Mar 15. PMID: 28323991
Meghan E McGee-Lawrence
Whole-body vibration has gained attention as a potential exercise mimetic, but direct comparisons with the metabolic effects of exercise are scarce. To determine whether whole-body vibration recapitulates the metabolic and osteogenic effects of physical activity, we exposed male wildtype (Wt) and leptin receptor deficient (db/db) mice to daily treadmill exercise or whole-body vibration for three months. Body weights were analyzed and compared with Wt and db/db mice that remained sedentary. Glucose and insulin tolerance testing revealed comparable attenuation of hyperglycemia and insulin resistance in db/db mice following treadmill exercise or whole-body vibration. Both interventions reduced body weight in db/db mice and normalized muscle fiber diameter. Treadmill exercise and whole-body vibration also attenuated adipocyte hypertrophy in visceral adipose tissue and reduced hepatic lipid content in db/db mice. Although the effects of leptin receptor deficiency on cortical bone structure were not eliminated by either intervention, exercise and whole-body vibration increased circulating levels of osteocalcin in db/db mice. In the context of increased serum osteocalcin, the modest effects of TE and WBV on bone geometry, mineralization, and biomechanics may reflect subtle increases in osteoblast activity in multiple areas of the skeleton. Taken together, these observations indicate that whole-body vibration recapitulates the effects of exercise on metabolism in type 2 diabetes.