If you're running or cycling, for example, build up your endurance for at least a month before you get into anything more intense.
举例来说，如果你是跑步或者骑车，那么就起码用一个月来锻炼耐力，再进行更高强度的练习。
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Caffeine has long been known to increase alertness and endurance, and a 2003 study led by UGA professor Patrick o 'connor found that caffeine reduces thigh pain during moderate-intensity cycling.
咖啡因很早就被用来增加警觉和耐力，乔治亚大学Patrick o ' Connor教授领衔的2003年的一项研究发现：咖啡因能减少中等强度骑车引起的大腿肌痛。