The effects of individualized frequency-amplitude whole body vibration training on postural control in elder individuals.

摘要

The purpose of this study is to determine the effects of whole body vibration on knee extensor muscle power, limits of stability, and sit-to-stand performance in community-dwelling elder individuals. Participants were randomly assigned to do body weight exercise with either an individualized vibration frequency and amplitude, a fixed vibration frequency and amplitude, or no vibration.;Twenty nine participants (mean +/- SD; age = 69.2 +/- 7.0 for individualized group; 65.7 +/- 8.4 for fixed group; 66.0 +/- 4.1 for control group) completed all the study procedures. Neither the individualized frequency-amplitude whole-body vibration (WBV) training protocol nor the fixed frequency-amplitude WBV training protocol improved isokinetic knee extensor power at 60 and 180 deg/s. The limits of stability end point excursion score for the individualized frequency-amplitude group increased by 8.8 (12.9%; p = .025) after training. No significant differences were observed in fixed and control group. The limits of stability maximum excursion score for the individualized frequency-amplitude group at baseline increased by 9.2 (11.5%; p = .006) after training. No significant differences were observed in fixed and control group. The baseline and post training results for directional control in the limits of stability test did not show any significant differences for all groups.;After 8 weeks of WBV training, the average weight transfer time score significantly decreased by 0.21 s in the fixed group. The participants in the individualized group showed a significant increase (3.2%) in weight rising index score after 8 weeks of WBV training. However, 8 weeks of WBV training did not significantly change center of gravity sway velocity scores. The present suggests that 8 weeks of WBV training improved balance and sit-to-stand performance.