何がおもしろい/興味あるかというと...

What's the interesting for me is that...

Regular Exercise

What's the interesting for me is that it can bring physical as well as mental health benefits. Especially swimming, which means floating on the water, helps me relax from bipedal walking all day long.

bipedal ﾊﾞｲペﾀﾞﾙ

Learn English

I reckon English is hands down the best global language, learn about different culture, date more people like you guys, and exercise my brain.

reckon レｺﾝ v)...だと思う《英 ｶｼﾞｭｱﾙ》　＝guess