Older adult subjects were recruited by public advertising in the Dayton Ohio community.
Thirty-five individuals expressed interest in the study and were assessed for eligibility by a licensed physical therapist for this particular study.
This single-blinded three-period cross-over study (ABB/BAA) consisted of two treatment arms (Figure 1).
Using a random number generator, subjects were assigned to receive either 2 Hertz (A) or 26 Hertz (B) as their first treatment.
Timed get up-and-go and chair sit-and-reach performances improved post-WBV for both sexes, were significantly different between 2 Hz and 26 Hz treatments ().
With this method, subjects easily figure out when they are or are not receiving WBV even if they listen to a tape-recorded sound of a vibrating WBV unit .Such improvements in muscle strength and power after WBV may be related to an increase in neuromuscular activation during and following WBV.One possibility for WBV action is through the vibratory stretch reflex in which the mechanical vibration elicits a myotactic stretch reflex mediated by the muscle spindle and Ia-afferents . Though popular, there is little agreement on what whole-body vibration (WBV) parameters will optimize performance. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.