Runner’s lean

我猜这里绝大多数人会摇头说不值。但是跑超马的人懂的。我这个不敢跑超马的只有敬佩。

医学上目前对这个现象还没有明确诊断。出现这种情况的人其实平时训练很正常，就是到了一定里程以后会出现。有专家说是因为臀肌弱导致腰方肌 QL muscle过度紧缩，有的说是电解质不够引起肌肉痉挛，有的说是跑姿习惯导致肌肉群分工不均衡。平时有针对的力量训练有助于纠正这个现象。像我这种没有坚实的基础，就不敢去跑超马。所以说，没那个金刚钻就……

人体真是一个神秘的机器。

这篇文章解释的更清楚。https://m.ultrarunning.com/article/the-ultra-lean-retro-running-treadmill-training?fbclid=IwZXh0bgNhZW0CMTEAAR2EgI714JEUvnHl--Wt11NHT6US1lmQvRxLhxdrn0ow0knA7T7vkL0XJtc_aem_AShNN6imDqQo8K8JZv29NRp4iQ7tytDIWcm1y1yQI6Y-KXdV-R0l5G3qdq48zhCpjWRDEpwjtrMskKALiHfGkzGA#:~:text=It's%20possible%20that%20a%20side,a%20problem%20but%20a%20symptom

Lateral trunk lean—when a runner leans to one side while running—is often observed during ultramarathons. It tends to manifest in the latter stages of a long race and, if you’re prone to side lean, it probably appears consistently on one side. Although it's tempting to impulsively attribute lateral trunk lean to a weakness in core stability—which we would correct with core exercises—the actual cause is more complex. It’s possible that a side lean would be initiated to offload an injured knee (1). However, assuming you’re not injured, the lean is more likely due to the muscles of the pelvis or legs being weaker on one side of the body, a strength imbalance that predisposes to fatigue. Trunk lean is not just a problem but a symptom.