Triceps-surae musculotendinous stiffness: Relative differences between obese and non-obese postmenopausal women
Triceps-surae musculotendinous stiffness: Relative differences between obese and non-obese postmenopausal women
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DOI：
10.1016/j.clinbiomech.2009.07.015
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发表时间：
2009-12-01
影响因子：
1.8
通讯作者：
Moreira, Helena
中科院分区：
文献类型：
--
作者：
Faria, Aurelio;Gabriel, Ronaldo;Moreira, Helena
背景：绝经后妇女肥胖与肌腱单位僵硬之间的关系缺乏研究。肌肉-肌腱单元僵硬似乎会影响人体的运动能力，僵硬过多和不足分别会增加骨骼和软组织损伤的风险。本研究旨在探讨绝经后妇女肌腱单位硬度与肥胖的关系。方法：105名绝经后妇女，年龄58[SD 5.5]。根据世界卫生组织的体重指数分类，分为正常体重组、肥胖前期组、肥胖I级组和肥胖II级组。在活体条件下，使用30%的最大自主等长收缩负荷，采用自由摆动技术评估踝部肌肉-肌腱单位的硬度。结果：方差分析显示，不同组间的肌肉-肌腱单位硬度有显著差异(P<；0.001)。后分析显示：正常体重-肥胖前期；正常体重-肥胖I级和正常体重-肥胖II级之间存在显著差异。正常体重组的僵硬度为15789(SD2969)N/m，肥胖前期为19971(SD3678)N/m，肥胖I级为21435(SD4295)N/m，肥胖II级为23497(SD1776)N/m。解释：肥胖者可能由于腿部骨骼肌脂肪渗透、运动范围限制和稳定性/姿势原因而增加了肌腱单位硬度，并可能更容易发生肌肉骨骼损伤。正常体重组的僵硬值与尚未绝经的研究报告的相同，这表明僵硬可能不受更年期的影响。(C)2009爱思唯尔有限公司。保留所有权利。
Background: There is a lack of research into the relationship between obesity and muscle-tendon unit stiffness in postmenopausal women. Muscle-tendon unit stiffness appears to affect human motion performance and excessive and insufficient stiffness can increase the risk of bone and soft tissue injuries, respectively. The aim of this study was to investigate the relationship between muscle-tendon unit stiffness and obesity in postmenopausal women.Methods: 105 postmenopausal women (58 [SD 5.5] years) participated. Four groups (normal weight, pre-obese, obesity class I and obesity class II) were defined according World Health Organization classification of body mass index. The ankle muscle-tendon unit stiffness was assessed in vivo with a free oscillation technique using a load of 30% of maximal voluntary isometric contraction.Findings: ANOVA shows significant difference in muscle-tendon unit stiffness among the groups defined (P < 0.001). Post hoc analysis reveals significant differences between the following groups: normal weight-pre-obese; normal weight-obesity class I and normal weight-obesity class II. The normal weight group had stiffness of 15789 (SD 2969) N/m, pre-obese of 19971 (SD 3678) N/m, obesity class I of 21435 (SD 4295) N/m, and obesity class IIof 23497 (SD 1776) N/m.Interpretation: Obese subjects may have increased muscle-tendon unit stiffness because of fat infiltration in leg skeletal muscles, range of motion restrictions and stability/posture reasons and might be more predisposed to develop musculoskeletal injuries. Normal weight group had identical stiffness values to those reported in studies where subjects were not yet menopausal, suggesting that stiffness might not be influenced by menopause. (C) 2009 Elsevier Ltd. All rights reserved.