Does walking count as exercise, or should I be doing something harder?

How to say “Does walking count as exercise, or should I be doing something harder?” in Japanese

In Japanese

歩(ある)くだけでも運動(うんどう)になる？ もっときついことしたほうがいいのかな。

Aruku dake demo undō ni naru? Motto kitsui koto shita hō ga ii no kana.

Does walking count as exercise, or should I be doing something harder? in other languages