High-impact exercise reduces premenopausal BMD loss
MedWire News: Encouraging women to complete brief high-impact exercise (HIE) in the office could reduce the risk for osteoporosis in healthy premenopausal, research suggests.
Ryoichi Nagatomi (Tohoku University, Sendai, Japan) and co-workers compared the effects of stretching exercises or stretching plus up to five sets of 10 vertical and versatile jumps 3 days a week over 12 months.
The team recruited 91 healthy, desk-bound premenopausal women and measured their baseline and 12-month proximal femur bone mineral density (BMD). Cardiovascular risk factors and leg strength were assessed. HIE was monitored using an accelerometer to measure daily impact load and the protocol changed to ensure progression.
Overall, 71.0% of women given stretching exercises alone and 75.6% of those given HIE completed the study.
As reported in the Journal of Bone and Mineral Metabolism, femoral neck BMD increased by 0.6% in HIE participants but decreased by 1.0% in women given only stretches. This difference was statistically significant even after adjusting for body mass index and calcium intake.
However, both groups experienced improvements in leg strength over the study, as well as reductions in adiponectin and low-density lipoprotein cholesterol, and an increase in high-density lipoprotein cholesterol.
“The results of this 12-month trial indicate that simple office-based HIE is a safe and effective method for preventing bone loss in the femoral neck,” Nagatomi et al conclude.
“This type of exercise can be recommended for healthy premenopausal Japanese women in order to prevent bone mineral loss.”
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By Lynda Williams