I just pulled a muscle in my back and aggravated my runner's knee, that's all.

保罗：我只是拉伤了背部的一块肌肉， 加重了我的跑步膝，仅此而已。

By playing in the game yesterday, or I guess it was today, Paul aggravated his runner's knee.

昨天参加比赛， 或者我猜是今天，保罗加重了他的跑步膝。