Effects of focal vibration on bone mineral density and motor performance of postmenopausal osteoporotic women

J Sports Med Phys Fitness. 2015 Jan-Feb;55(1-2):118-27.


Aim: This randomized double blind controlled study is aimed at determining the effect of repeated vibratory stimuli focally applied to the contracted quadriceps muscles (repeated muscle vibration=rMV) on bone mineral density, leg power and balance of postmenopausal osteoporotic women.

Methods: The study has been conducted on 40 voluntary postmenopausal osteoporotic women, randomised at 2 groups for rMV treatment and for control. The treatment group underwent rMV (100Hz, 300-500 μm; three applications per day, each lasting 10-minutes, for 3 consecutive days) applied to voluntary contracted quadriceps (VC=vibrated and contracted group). The control group, received a sham stimulation on contracted quadriceps (NV=non vibrated group). Bone mineral density T-score of proximal femur of the participants, was evaluated in two weeks before and 360 days after intervention; body balance and explosive leg power were measured 1 day before, 30 days and 360 days after treatment.

Results: VC group T-score at one year didn't change significantly relative to baseline values (pretreatment: -2.61±0.11, post-treatment -2.62±0.13); conversely in NV subjects T-score decreased significantly from -2.64 ± 0.15 SD down to -2.99 ± 0.28 SD. A significant improvement of balance and explosive leg power was observed only in VC group at 30 and 360 days after the intervention.

Conclusion: We conclude that rMV is a safe, short-lasting and non-invasive treatment that can significantly and persistently improve muscle performance and can effectively counteract progressive demineralisation in postmenopausal and osteoporotic women.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Aged
  • Double-Blind Method
  • Female
  • Humans
  • Lower Extremity / physiology*
  • Middle Aged
  • Muscle Strength / physiology*
  • Osteoporosis, Postmenopausal / physiopathology
  • Osteoporosis, Postmenopausal / therapy*
  • Postural Balance / physiology*
  • Vibration / therapeutic use*