What was once a loopy stunt attempted by only a few weirdos is now a rite of passage for many, the coolest test out there of fitness and health.

• 曾经马拉松只是少数怪人关注和参与跑圈活动，而现在却成为很多人乐于参与的活动，是检验体质和健康的最酷的方式。