I was cold and my leg hurt so that it made me sick.

我身子冷，腿又疼得那么厉害，难过得想呕吐。

youdao

I banged into a chair and hurt my leg.

我撞到椅子上，碰伤了腿。

《牛津词典》

Unluckily, my brother fell off his bike and hurt his leg.

不幸的是，我弟弟从自行车上摔下来，摔伤了腿。

youdao

Then, about a year and half ago I hurt my leg, and I couldn't run for several months, and I began to work on the Stairmaster.

BBC: News | Monitoring | President Clinton on Shanghai radio phone-in