Osteoporos Sarcopenia.  2019 Sep;5(3):69-74. 10.1016/j.afos.2019.07.001.

Possible effects of whole body vibration on bone properties in growing rats

Affiliations
  • 1Department of Physical Therapy, Faculty of Health Science, Kio University, Kitakatsuragi-gun, Japan. a.minematsu@kio.ac.jp
  • 2Department of Physiology I, Nara Medical University, Kashihara, Japan.

Abstract


OBJECTIVES
To examine the effects of whole body vibration (WBV) on bone properties in growing rats, and to explore the optimal conditions for enhancing bone properties.
METHODS
Thirty-six 4-week-old male rats were divided into 1 control and 5 experimental groups. Each experimental group underwent WBV at 15, 30, 45, 60, and 90 Hz (0.5 g, 15 min/d, 5 d/wk) for 8 weeks.We measured bone size, muscle weight and bone mechanical strength of the right tibia. Trabecular bone mass and trabecular bone microstructure (TBMS) of the left tibia were analyzed by micro-computed tomography. Serum levels of bone formation/resorption markers were also measured.
RESULTS
WBV at 45 Hz and 60 Hz tended to enhance trabecular bone mass and TBMS parameters. However, there was no difference in maximum load of tibias among all groups. Serum levels of bone resorption marker were significantly higher in the 45-Hz WBV group than in the control group.
CONCLUSIONS
WBV at 45-60 Hz may offer a potent modality for increasing bone mass during the period of rapid growth. Further studies are needed to explore the optimal WBV conditions for increasing peak bone mass and TBMS parameters. WBV modality may be a potent strategy for primary prevention against osteoporosis.

Keyword

Bone mechanical strength; Frequency; Growing rats; Trabecular bone microstructure; Whole body vibration

MeSH Terms

Animals
Bone Resorption
Humans
Male
Osteoporosis
Primary Prevention
Rats*
Tibia
Vibration*
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