Does focal mechanical stimulation of the lower limb muscles improve postural control and sit to stand movement in elderly?

Backgrounds: Imbalance in elderly is a common problem strictly related to fall. Aims: This study investigates the possibility that a new protocol based on the focal mechanical muscle vibration may improve balance and stability in elderly. Methods: Pre-post non-randomized clinical trial has been used. Patients referring postural disequilibrium with negative vestibular bed-side examinations have been treated with focal muscle vibration applied to quadriceps muscles and evaluated before and immediately after therapy and after 1 week and after 1 month with postural stabilometric examination and with an inertial measurement units during the time up and go test. Results: Stabilometric analysis showed statistically significant differences in both the area (p = 0.01) and sway (p < 0.01) of the center of pressure during the close eyes tests. Moreover, the global time of the time up and go test was reduced (p < 0.05) and the rotation velocity was increased (p < 0.01). Conclusions: The findings confirm the beneficial role of focal muscle vibration in elderly patients improve postural stability and mobility.