As a bionic therapy, hand-foot crawling has been reported to be used for the rehabilitation of low back pain. However, there have been few relevant biomechanical studies about this type of exercise. The purpose of this study was to calculate muscle activation and lumbar spinal load based on the examined limb kinematics and kinetics, which associated with hand-foot crawling at the different Centre of Mass (CoM) heights. A total of 14 men performed hand-foot crawling at three CoM heights. The kinematics and kinetics data were collected. One-way repeated measure analysis of variance was used to analyze the effect of the CoM height on crawling parameters. The crawling data from one subject at the three heights were used to calculate the muscle activation and compressive lumbar load with an OpenSim musculoskeletal model. The CoM heights had no significant effect on kinematics, kinetics or muscle activation. The spinal load was larger at higher heights. Hand-foot crawling was associated with lower trunk muscle activity. This study helps us to understand hand-foot crawling from the perspective of biomechanics. The findings from this study may help physical therapists choose hand-foot crawling as an appropriate exercise for patients with low back pain during early rehabilitation.

中文翻译：

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不同高度的手足爬行的肌肉骨骼建模

作为仿生疗法，据报道手足爬行可用于下腰痛的康复。然而，关于这种运动的相关生物力学研究很少。这项研究的目的是根据检查的肢体运动学和动力学来计算肌肉激活和腰椎负荷，这些运动与动力学与不同质量中心（CoM）高度的手足爬行有关。共有14名男子在3个CoM高度上进行了手足爬行。收集了运动学和动力学数据。使用单向重复测量方差分析来分析CoM高度对爬网参数的影响。来自一名受试者在三个高度处的爬行数据用于通过OpenSim肌肉骨骼模型计算肌肉激活和腰椎压缩负荷。CoM高度对运动学，动力学或肌肉激活没有显着影响。在较高的高度，脊柱负荷较大。手足爬行与躯干肌肉活动降低有关。这项研究有助于我们从生物力学的角度理解手足爬行。这项研究的发现可能有助于物理治疗师选择手足爬行作为早期康复过程中腰痛患者的适当锻炼方法。