Int J Med Sci 2015; 12(6):494-501. doi:10.7150/ijms.11364
Changes in Bone Biomarkers, BMC, and Insulin Resistance Following a 10-Week Whole Body Vibration Exercise Program in Overweight Latino Boys
1. The Clinical Exercise Research Center, Division of Biokinesiology and Physical Therapy at the School of Dentistry, University of Southern California, Los Angeles, USA
2. Center for Transdisciplinary Research on Energetics and Cancer, Keck School of Medicine, University of Southern California, Los Angeles, USA
3. Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, USA
Erceg DN, Anderson LJ, Nickles CM, Lane CJ, Weigensberg MJ, Schroeder ET. Changes in Bone Biomarkers, BMC, and Insulin Resistance Following a 10-Week Whole Body Vibration Exercise Program in Overweight Latino Boys. Int J Med Sci 2015; 12(6):494-501. doi:10.7150/ijms.11364. Available from http://www.medsci.org/v12p0494.htm
Purpose: With the childhood obesity epidemic, efficient methods of exercise are sought to improve health. We tested whether whole body vibration (WBV) exercise can positively affect bone metabolism and improve insulin/glucose dynamics in sedentary overweight Latino boys. Methods: Twenty Latino boys 8-10 years of age were randomly assigned to either a control (CON) or 3 days/wk WBV exercise (VIB) for 10-wk.
Results: Significant increases in BMC (4.5±3.2%; p=0.01) and BMD (1.3±1.3%; p<0.01) were observed for the VIB group when compared to baseline values. For the CON group BMC significantly increased (2.0±2.2%; p=0.02), with no change in BMD (0.8±1.3%; p=0.11). There were no significant between group changes in BMC or BMD. No significant change was observed for osteocalcin and (collagen type I C-telopeptide) CTx for the VIB group. However, osteocalcin showed a decreasing trend (p=0.09) and CTx significantly increased (p<0.03) for the CON group. This increase in CTx was significantly different between groups (p<0.02) and the effect size of between-group difference in change was large (-1.09). There were no significant correlations between osteocalcin and measures of fat mass or insulin resistance for collapsed data.
Conclusion: Although bone metabolism was altered by WBV training, no associations were apparent between osteocalcin and insulin resistance. These findings suggest WBV exercise may positively increase BMC and BMD by decreasing bone resorption in overweight Latino boys.
Keywords: prepubescent, exercise, osteocalcin, insulin sensitivity, fat mass