Are hybrid sit–stand postures a good compromise between sitting and standing?
Are hybrid sit–stand postures a good compromise between sitting and standing?
复制标题
坐站混合姿势是否是坐姿和站姿之间的良好折衷方案？
作者：
Mamiko Noguchi;Michal N Glinka;Graham R. Mayberry;Kimihiro Noguchi;J. Callaghan
传统坐姿和站立姿势的潜在替代品是混合式坐姿（即栖息）。本研究的目的是：(1)确定坐姿和站立时腰骨盆和骨盆的角度偏离的位置；(2)使用这些断点来定义坐姿、卧姿和站立这三个不同的姿势阶段，以检查不同阶段之间肌肉激活和地面反作用力的差异。24名参与者完成了19项1分钟的静态试验，从坐姿（90°）到站立（180°），依次以5°躯干-大腿角度增量进行。栖期雄性为145°~ 175°，雌性为160°~ 175°。无论男女，站立时的膝关节伸肌活动都比坐着或坐着时低（p < 0.01）。前后作用力在栖息时最高（p < 0.001），需要约15%的体重。在115-170°躯干-大腿角范围内减少下肢需求的椅子设计可以提高维持栖息姿势的可行性。从业者总结：静坐或站立时腰痛的个体可能受益于混合式坐立姿势，但与这些姿势相关的运动学和动力学变化尚未被调查。休息可以改善腰椎姿势，但代价是增加下肢的需求，这提示了椅子设计改进的潜在途径。缩写：A/P：前-后；M / L: medial-lateral;LBP：腰痛；肌电图:肌电图;TES：胸竖脊；LES：腰竖脊肌；VMO：股内侧斜肌；MVC：最大自愿收缩；ASIS：髂前上棘；PSIS：髂后上棘；BW：体重；RMSE：均方根误差；SD：标准差；ROM：活动范围
Abstract Potential alternatives for conventional sitting and standing postures are hybrid sit-stand postures (i.e. perching). The purposes of this study were (i) to identify where lumbopelvic and pelvic angles deviate from sitting and standing and (ii) to use these breakpoints to define three distinct postural phases: sitting, perching, and standing, in order to examine differences in muscle activations and ground reaction forces between phases. Twenty-four participants completed 19 1-min static trials, from sitting (90°) to standing (180°), sequentially in 5°trunk–thigh angle increments. The perching phase was determined to be 145–175° for males and 160–175° for females. For both sexes, knee extensor activity was lower in standing compared to perching or sitting (p < .01). Anterior–posterior forces were the highest in perching (p < .001), requiring ∼15% of body-weight. Chair designs aimed at reducing the lower limb demands within 115–170° trunk–thigh angle may improve the feasibility of sustaining the perched posture. Practitioner summary: Individuals who develop low back pain in sitting or standing may benefit from hybrid sit-stand postures (perching), yet kinematic and kinetic changes associated with these postures have not been investigated. Perching can improve lumbar posture at a cost of increased lower limb demands, suggesting potential avenues for chair design improvement. Abbreviations: A/P: anterior-posterior; M/L: medial-lateral; LBP: low back pain; EMG: electromyography; TES: thoracic erector spinae; LES: lumbar erector spinae; VMO: vastus medialis obliquus; MVC: maximum voluntary contraction; ASIS: anterior superior iliac spine; PSIS: posterior superior iliac spine; BW: body weight; RMSE: root mean square error; SD: standard deviation; ROM: range of motion
腰椎粘弹性组织蠕变引起的肌肉功能障碍。
DOI：
10.1016/s1050-6411(03)00045-2
发表时间：
2003
期刊：
Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology
影响因子：
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作者：
Solomonow,M;Baratta,RV;Zhou,B-H;Burger,E;Zieske,A;Gedalia,A
通讯作者：
Gedalia,A