To TS: Your worries are unfounded. Don't worry so much. I used
to worry also before enlistment cause I was also rather skinny
then. Then I realised that SAF isn't that tough, although at times
can be straining. As long as you can do some decent chin-ups (well
even if you can't, you'd be trained to) and have enough stamina for
those runnings, then you are well and safe. And you will also
realise there will be people like you.
Seriously, SAF has become rather mellowed, especially now with all
the 3rd gen army cra.p.
And yeah. I am also a testimony to growing fat after army. Most of
my camp mates also ballooned when ORDing that time. Haha.