I was in the gym lifting weights.

我正在健身房举哑铃。

《柯林斯英汉双解大词典》

You'd start lifting weights with 45 pounds and then move up to 50 pounds and then 75 pounds and so on.

你可以开始时举45磅，然后是50，然后是75，直至更多。

youdao

I know expert of that, but I think you can try lifting weights and do at least 200 sit-ups twice a day.

我知道这方面的专家，但我认为你可以试试举重并且做至少200个仰卧起坐，每天做两次。

youdao

This kind of exercise includes things like lifting weights, or doing sit-ups and push-ups.

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