概念 - 抖脚(Fidgeting)

参考

1. https://cn.nytimes.com/health/20161220/why-fidgeting-is-good-medicine/dual/
2. https://baike.baidu.com/item/抖脚/9675418
3. https://www.zhihu.com/question/25395748/answer/30837598

总结

1. 抖脚有益身体下部血液循环，有益健康。
2. 抖脚能使人专注，提高效率。