The present study examined the effects of a 6-week whole-body vibration training (WBVT) regimen on heart rate variability (HRV) and body composition in obese Hispanic postmenopausal women. Participants were randomly assigned to either WBVT (n = 13) or a nonexercising control group (n = 14). HRV and body composition were measured before and after 6 weeks. There was a significant group by time interaction (P < .05) for heart rate, sympathovagal balance, and body fat percentage (BF%) such that all significantly decreased (P < .05); and R-R intervals significantly increased (P < .05) following WBVT compared to no changes after control. The changes in sympathovagal balance were correlated with changes in BF% (r = .63, P < .05). Our findings indicate that WBVT improves HRV and BF% in obese Hispanic postmenopausal women. The improvement in BF% partially explained the decrease in sympathovagal balance. Since obese and older individuals are at increased risk of developing cardiovascular diseases, they could potentially benefit from WBVT.
Severino is with the Department of Physical Education, University of Puerto Rico, Mayagüez, PR. Sanchez-Gonzalez is with Larkin Community Hospital and Larkin Health Sciences Institute, Miami, FL. Walters-Edwards, Nordvall, and Wong are with the Department of Health and Human Performance, Marymount University, Arlington, VA. Chernykh is with the Department of Philosophy, Nosov Magnitogorsk State Technical University, Magnitogorsk, Chelyabinsk Region, Russia. Adames is with Centro de Fisioterapia Aguadeño, Aguada, PR.