摘要
目的:通过对青年女性不同部位肌力、身体成分、BMD的同步综合性实验,探讨它们之间的确切关联,为骨质疏松早期干预和女性体质改善提供依据。方法:25—44岁女性(5岁分组),进行仰卧推举、负重蹲起、负重屈肘的1RM和仰卧推举15RM、仰卧举腿等肌力与耐力测试;同步使用GE双能X线骨密度仪进行全身、正位脊椎(L2—L4)、双侧股骨颈BMD及体脂百分比、肌肉含量等身体成分测定。结果:青年女性30岁以后,体重和体脂百分比有明显上升,BMD水平在30岁左右最高。仰卧推举与全身BMD值的相关系数为0.344—0.728。40—44岁年龄组仰卧举腿次数与正位脊柱BMD相关系数为0.726(P<0.05),提示随着年龄的增大,腰腹肌肉耐力可在一定程度上影响正位脊柱BMD水平。结论:青年女性的上肢和胸背部最大肌力、胸背部、腰腹部肌肉耐力与骨密度关系密切,提示加强这部分肌力练习的针对性,对于提高全身BMD有更为积极的作用;青年女性从40岁左右开始全身BMD水平下降明显,其中股骨颈的BMD下降更早;增加肌肉含量对提高骨密度水平有直接作用。
Objective： To investigate the association of bone mineral density （BMD） and muscle strength, endurance, body composition by the synchronization comprehensive experiments in young women, to provide the evidence of rehabil- itation of osteoporosis and the improvement of female physique. Method： In this study 106 women with age 25--44 were evaluated. All the subjects performed maximum muscle strength tests （1RM bench press, 1RM weight squat, 1RM biceps curl） and muscle endurance tests （supine leg raise, 15RM bench press, et al）. Body composition （lean mass, fat mass, and fat percent） and BMD of lumbar spine （L2--IA）, femoral neck, and total body were measured by dual-energy X-ray absorptiometry（DEXA）. Result：When the young women were after age 30, body mass and body fat percent increased obviously, BMD in 30 years old or so reached the peak level. The correlation coefficient of bench press and whole body BMD was 0.344--0.728. The correlation coefficient of supine leg raise and lumbar spine BMD was 0.726（P〈0.05） in 40-- 44 age group. The increase of age, lumbar abdomen muscle endurance in a certain extent impacted lumbar spine BMD level. Conclusion： BMD was associated with the maximum muscle strength of upper limbs, chest and back, as well as the muscle endurance of chest and back, waist and abdomen in young women. It suggested that muscle strengthening interventions may contribute to the bone health. The whole body BMD begin to decrease significantly in young women aged 40, the femoral neck BMD levels decrease earlier. The increase of muscle mass may has a direct effect in improving BMD level.
出处
《中国康复医学杂志》
CAS
CSCD
北大核心
2012年第10期903-907,共5页
Chinese Journal of Rehabilitation Medicine
基金
教育部人文社会科学研究一般项目(11YJAZH081)
关键词
肌肉力量
身体成分
骨密度
muscle strenh
body composition
bone mineral density
