my muscles felt "pulled" if i hold in my stomach and keep
straight... it make my back even more tired... issit supposed to be
like tis?
anw i lazy back... if i wear flats, i tend to slouch >.<
today i wore my boots and i actually have a better posture...
blue i scare i go swim end up eat more, bec more fat leh...
plus... i can't swim hahahhaahahhaa
yeah.. holding in your stomach is not hold until very tight..
just pull in the lower tummy about 1/2 to 1 cm can already.. that
way, the abdominal muscles will be taking the strain from the
back...
the back muscles will be tired no matter, that's why must
stretch them out so that they don't cramp up and they can actually
get stronger gradually..
here's a stretch which helps...

this stretch is very good for the sciatic nerves... but
beginning, don't push so much.. you'll end up messing up your
muscles.. go to the level where the stretch starts, push a little
and hold, release.. then repeat..

and you can also try this stretch at home..

try them.. but very very slowly.. and best if you have support
of someone around you helping you move slowly.... else you strain
your back again..