The physical demands of the tree (vriksasana) and one-leg balance (utthita hasta padangusthasana) poses performed by seniors: a biomechanical examination.
The physical demands of the tree (vriksasana) and one-leg balance (utthita hasta padangusthasana) poses performed by seniors: a biomechanical examination.
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DOI：
10.1155/2012/971896
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Salem GJ
中科院分区：
文献类型：
--
作者：
Yu SS;Wang MY;Samarawickrame S;Hashish R;Kazadi L;Greendale GA;Salem GJ
瑜伽被认为特别适合老年人，因为姿势可以修改以适应练习者的能力和限制。在这项研究中，健康老年人(n=20；70.1±3.8JMOF)的生物力学评估被用来量化与两种经典的哈达瑜伽姿势-树和单腿平衡的3种变化(入门、中级和高级)相关的身体需求(关节净力矩[JMOF]和下肢肌肉激活)。用ANOVA和Cohen‘s-d对体位变化进行统计学对比。高级(单肢，没有额外支持)版本被认为产生了最大的需求，其次是中级(单肢[树]和双侧肢体[OLB])和介绍性(双侧肢体)版本。然而，我们的发现表明，关于姿势修改的常见、长期持有的概念可能是违反直觉的。中、晚期Tree变异的髋关节和膝关节JMOF在矢状面和额面上均无差异(P=0.13~0.98)。同样，OLB的引导性和中级变化导致的矢状面JMOF与经典的臀部和膝部的高级姿势相反(P<；.001；d=0.98-2.36)。这些生物力学见解提供的证据可供教练、临床医生和治疗师在为他们的瑜伽参与者选择姿势修改时使用。
Yoga is considered especially suitable for seniors because poses can be modified to accommodate practitioners' capabilities and limitations. In this study, biomechanical assessments on healthy seniors (n = 20; 70.1 ± 3.8 yr) were used to quantify the physical demands, (net joint moments of force [JMOFs] and muscular activation in the lower extremities) associated with the performance of 3 variations (introductory, intermediate, advanced) of 2 classical Hatha yoga poses – Tree and One-Leg Balance (OLB). ANOVA and Cohen's-d were used to contrast the postural variations statistically. The advanced (single-limb, without additional support) versions were hypothesized to generate the greatest demands, followed by the intermediate (single-limb [Tree] and bilateral-limb [OLB] with support) and introductory (bilateral-limb) versions. Our findings, however, suggest that common, long-held conceptions about pose modifications can be counter-intuitive. There was no difference between the intermediate and advanced Tree variations regarding hip and knee JMOFs in both the sagittal and frontal planes (P = 0.13–0.98). Similarly, OLB introductory and intermediate variations induced sagittal JMOFs that were in the opposite direction of the classic advanced pose version at the hip and knee (P < .001; d = 0.98–2.36). These biomechanical insights provide evidence that may be used by instructors, clinicians and therapists when selecting pose modifications for their yoga participants.
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发表时间：
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影响因子：
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