长时间低头会让颈椎处于非自然弯曲状态，压迫神经和血管，相当于挂了一个10公斤的沙袋，时间长了可能导致颈椎病的发生，引发手指麻木、握力下降等症状。而手肘长时间弯曲、手腕悬空操作，也容易诱发“鼠标手”（腕管综合征）和“手机肘”（肘管综合征）。

I went to Formula One expecting fast cars and champagne showers. What I found at Austin's Circuit of the Americas during the preliminary races of the U.S. Grand Prix on Friday was a sprawling, ...