Effect of office-based brief high-impact exercise on bone mineral density in healthy premenopausal women: the Sendai Bone Health Concept Study
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Although there is ample evidence supporting the effectiveness of physical activity in the prevention and treatment of osteoporosis, there are no previous studies to examine the effect of office-based brief high-impact exercise (HIE) on bone mineral density (BMD) in healthy premenopausal women. This study evaluated the effects of office-based HIE on BMD in healthy premenopausal Japanese women. Ninety-one healthy premenopausal women were randomized to receive stretching exercise (SE) or HIE (stretching, along with up to 5 × 10 vertical and versatile jumps) for 12 months. The BMD of the lumbar spine and proximal femur was measured using dual-energy X-ray absorptiometry. Several cardiovascular risk factors and leg strength also were assessed. An accelerometer-based recorder was used to measure daily impact loading in four 1-week samples. The progression of the HIE program was ensured by the accelerometer. Thirty-three women (71.7%) in the SE group and 34 (75.6%) in the HIE group completed the study. There was a significant difference in the change in the femoral neck BMD between the groups in favor of the HIE group [0.6% (95% CI: −0.4, 1.7) vs. −1.0% (95% CI: −2.2, 0.2)]. Adiponectin, LDL, HDL, and the leg strength of participants in both the groups improved during the intervention. These finding suggested that office-based brief HIE can be recommended for premenopausal women for preventing bone mineral loss.
KeywordsOsteoporosis Impact exercise Bone mineral density Accelerometer
We gratefully acknowledge all the women who participated in the study, the exercise instructors, and NTT Solco for the possibility to perform the study. We thank Erkki Vihriälä for providing technical assistance in the accelerometric measurements and Newtest Ltd. for providing the bone exercise recorders. The study was financially supported by the Sendai Industrial Promotion Organization and Oulu Innovation Ltd. RA was supported by the Academy of Finland and the National Graduate School of Musculoskeletal Disorders and Biomaterials. TJ was supported by the Academy of Finland.
Conflict of interest
Doctors Korpelainen, Vainionpää, and Jämsä have a patent application with Newtest Ltd. Doctor Jämsä is also a minor shareholder of Newtest Ltd.
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