Try not to weasel your way out of the physical activities if you
are actually fit for them. They definitely are good for you.
There is this guy in my platoon who seemed extremely healthy, but
surprised everyone with a downgrade letter one day. My PC was not
very convinced by his case, and so he decided to fight for him to
stay in the platoon as a "Sai
Kang warrior".
He is feeling very miserable now, and probably regrets it right
now...