YOU SAID:

Umm, I’m really bad at doing pull ups because my arms are weak.

INTO JAPANESE

うーん、腕が弱いので引き上げが苦手です。

BACK INTO ENGLISH

Well, I am not good at pulling it because I have weak arms.

INTO JAPANESE

腕が弱いので、引っ張るのは得意ではありません。

BACK INTO ENGLISH

I am not good at pulling because my arms are weak.

INTO JAPANESE

腕が弱いので引っ張るのは苦手です。

BACK INTO ENGLISH

I am not good at pulling because my arms are weak.