| 제목 |
Efficacy of Whole-Body Vibration Training for Muscle Strength and Physical Performance in Old Adults |
| 소속 |
Jeonbuk National University Medical School, Jeonju, 54907, Republic of Korea , Department of Physical Medicine & Rehabilitation1, Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, 54907, Republic of Korea, Research Institute of Clinical Medicine of Jeonbuk National University2, Jeonbuk National University Hospital, Jeonju 54907, Republic of Korea, 3Translational Research & Clinical Trial Center for Medical Device3 |
| 저자 |
Nam-Gyu Jo1,2*, Da-Sol Kim1,2, Yu Hui Won1,2, Sung-Hee Park1,2, Myoung-Hwan Ko1,2, Jeong-Hwan Seo1,2, Gi-Wook Kim1,2† |
Objective
Reducing the deterioration of daily living ability due to weakening of muscle strength of older adults is a socially important issue and various exercise methods for older adults are being studied. Whole-body vibration training (WBVT) is emerging as alternative exercise that older adults can easily do. The aim of this clinical trial was to investigate the efficacy of WBVT in improving muscle strength and physical performance compared to conventional exercise in older adults.
Methods
This prospective, randomized, single-blind controlled trial was conducted in older adults over 65 years of age. Forty subjects were randomly assigned to the two groups. The WBVT group (n=20) performed WBVT (20 min) using a vibrating platform (SW-VC15™), followed by strengthening exercises (20 min). The control group (n=20) performed stretching (20 min) instead of WBVT. Both groups underwent a 50-minute training per session, total 12 sessions (3 sessions per week for 4 weeks).
The primary outcomes was isokinetic dynamometer (peak torque, average power in 60deg/sec) and grip power. The secondary outcomes was Short Physical Performance Battery (SPPB), body composition analysis using InBody®720, and 36-Item Short Form Survey (SF-36). These measures were assessed at three time points: evaluation 1 (E1, pretreatment), evaluation 2 (E2, after treatment), and evaluation 3 (E3, 4 weeks after treatment). Inter-group and intra-group comparison were conducted for all outcomes.
Results
In the primary outcomes (isokinetic dynamometer and grip power), both groups showed a significant increase in lower extremity muscle power before and after training in intra-group comparison. In inter-group comparison, although there were no significant differences in inter-group comparisons at each time-point, the WBVT group showed a higher peak torque change than the control group (E2–E1; WBVT: Δ7.03±9.26, control: Δ3.49±5.89). Also, there were no significant results in grip power. In the secondary outcome, in the intra-group comparison, both groups showed significant improvement in total score of SPPB (E1-E2 and E1-E3 in WBVT; E1-E2 in control), but no difference in inter-group comparison. Skeletal muscle mass measured by InBody®720 was decreased in control group in intra-group comparison (E1-E2). In SF-36, only the control group showed significant improvement in intra-group comparison.
Conclusion
Both the WBVT and the control groups showed a significant improvement in lower extremity muscle power and physical performance before and after training. WBVT may be an alternative exercise method that can be safely performed by older adults.
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