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Popular whole-body-vibration exercise: not an effective therapy for the prevention of bone loss
Date:11/14/2011

re labourious and intense exercises.

Participants in the study were 202 healthy postmenopausal women, with a mean age of 60, who were not on any prescription bone medications. They were randomized into three separate arms of the clinical trial which included low magnitude (which mimics muscle contractions in activities such as walking) at either 30Hz or 90 Hz oscillations. They were asked to stand on the platform for 20 minutes daily at home for 12 months.

The control group was asked not to use WBV therapies. All women were provided calcium and vitamin D supplements at baseline and six months, so that their daily intakes approximated 1200 mg and 1000 IU, respectively.

At baseline and 12 months, bone structure and bone density were measured at the hip, and lumbar spine, using dual-energy X-ray absorptiometry, and at the forearm and lower leg using high-resolution peripheral quantitative computed tomography (CT scan), the most advanced imaging technology for measuring bone structure and density.

Twelve months of low-magnitude WBV at 90 and 30 Hz did not result in any significant changes in either bone density or bone structure in the participants as measured at the hip or lumbar spine, or lower leg or forearm, compared to those participants who did not do WBV.

The study concludes that low-magnitude WBV is not an effective therapy for the prevention of bone loss in postmenopausal women.

Instead, Dr. Cheung recommends that for women without osteoporosis, adequate calcium and vitamin D through diet and supplements, as well as weight-bearing exercises such as walking, dancing, or exercising with small weights, are better strategies for maintaining strong bones.


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Contact: Alex Radkewycz
Alexandra.Radkewycz@uhn.ca
416-340-3895
University Health Network
Source:Eurekalert

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