那些柔曲性不佳的男性比女性步伐快。对男性和女性来讲，那些筋肌最紧的人就拥有最快的步伐频率。

The inflexible men were more economical than the women, and for both men and women, those with the tightest hamstrings had the best running economy.

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保守估计，霸王龙的二头肌有430磅的曲力。

“The bicep alone—and this is a conservative estimate—could curl 430 pounds, ” Conrad says.

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目的：探讨腰大肌的作用及其与人类腰曲形成的关系。

Objective: To investigate the relationship of musculus psoas major role and the formation of lumbar curvature.

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