Japanese: Is this correct?

I hope this translation is somewhat helpful for you.

When I am happy, I exercise. It is fun.

→私（わたし）が幸せな時、私は運動します。それ（運動）は楽しいです。

This translation is more natural when you write and speak in Japanese.

嬉しい is ok, but if you want to say " 嬉しい " , glad is more suitable.

If you have questions regarding to this one, let me know again. I would like to explain until you understand. Keep up the good work. (^^)

from keiko