Miss

Ah that makes sense. Definitely gotta get it done then!

I met many people who have went to the army/marines and they all told me it's hard work.

I've seen them make some huge transformations

Here army is obligatory(not that I wouldn't go if it was optional) but there is recommended-condition, and besides, I'm tired of being a lazy and overweight.

but it definitely is harder than normal life.