Résumé
Objective:To study the effects of whole body vibration(WBV)on resistance fracture after postmenopausal obesity women.Methods:A 12-weeks prospective and randominzed trial of 100 postmenopausal women with body mass index(BMI)≥23.The subjects were exposed to three 10-minutes treaments/week,low-magnitude(2.0m/s)and 30Hz vertical accelerations. Dual-energy X-ray absorptiometry(DXA)was used to measure bone mineral density(BMD)at the L_2～L_4 and the neck of left femur at baseline after 12weeks.Mobility Evaluation System was measured the mass and force of music in lower limbs and the force of resistance fracture in femoralneck after 12weeks intervention.Results:Ninty-six women completed the 12-weeks trial. BMD of treatment subjects increased 62.96% with a gain 0.65% in the L_2～L_4,whereas,contral group was increase 26.83% with a loss 0.89%.In the femoralneck,the 72.22% increase observed in the vibration group,contral group was increase 19.51%,the benefit were 1.62% and-1.38% in two groups.The left musle force exhibited a increase 83.33%with benefit of 12.14% in treament group and little increase 29.27% with loss of-8.15% in non-vibration group.The resistance fracture of force of femoralneck was significantly increase in the mechanical group,the increase and gain rate were 83.33%,2.65%,19.51% and -1.52%.Conclusion:WBV of low-level and high-frequency may be effecies for inhibiting the decline in BMD after postmenopausal obesity women,in addition,the musle force in lower limbs and the force of resistance fracture were significantly increase.