"Most runners start speed sessions with an inadequate warmup, " says Sean Coster, a coach and exercise physiologist for the Nike Bowerman Athletic Club in Beaverton, Oregon.

“很多跑步者在加速阶段都不能做好热身准备，”来自俄勒冈州比弗顿耐克体育俱乐部的教练和锻炼心理学家SeanCoster说。