YOU SAID:

I've went to the gym for 2 hours today. I'm very sweaty and I'd like to take a rest.

INTO JAPANESE

今日は2時間ジムに行ってきました。とても汗をかいたので休みたいです。

BACK INTO ENGLISH

I went to the gym for 2 hours today. I'm sweating so much that I want to rest.

INTO JAPANESE

今日は2時間ジムに行きました。汗がすごいので休みたいです。

BACK INTO ENGLISH

I went to the gym for 2 hours today. I'm sweating so much that I want to rest.