长期太极拳练习对老年人骨密度的影响

Effects of long-term shadowboxing exercise on bone mineral density in the aged

目的探讨长期太极拳练习对老年性骨质疏松症发生的影响。方法将60名老年人(60～70岁)分为太极拳练习组(n=28)和普通老年组(n=32),采用美国Norland公司生产的XR-36型双能X线骨密度仪(DXA)测量L2～4侧位骨密度(BMD)和股骨颈,大粗隆,Wards区的BMD。结果老年男性、女性太极拳练习组各部位骨密度高于普通组,且有显著性差异(t=-6.63～-2.23,P<0.05,P<0.01);太极拳练习年限超过5年以上,锻炼年限与各部位骨密度无明显关系(t=0.08～1.60,P>0.05)。结论太极拳练习可以有效地增高老年人的骨密度;随着锻炼年限的延长,太极拳练习对老年性骨质疏松症的预防作用比较有限。

Aim To explore the effects of long-term Shadowboxing exercise in preve ntion of osteoporosis in the aged.Methods Sixty old people,20 males and 40 femal es with an average age of(67.0±1.3) years, were divided into two groups: contro l group without conscious exercise(n=32), and exercise group with Shadowboxing e xercise(n=28).The bone mineral density (BMD) of lumber spine(L2-4) and proximal femur(neck of femur,torch,wards triangle) of 60 old people was measured by doub le energy X-ray absorption(DEXA) made in American Norland Corporation.Results T he BMD of lumber spine and proximal femur in the Shadowboxing exercise group wer e significantly higher than those of the controls(t=-6.63 to -2.23, P< 0.05).T he BMD was insignificantly correlated with the exercise year over 5 years (t=0.0 8～1.60,P >0.05). Conclusion Shadowboxing exercise increases the BMD of the aged people effectively. With time passed, the prevention of shadowboxing exercise a gainst osteoporosis is limited.