to a certain extent, your friend may be right.
when you exercise, your blood moves faster, and suddenly, you feel
better.
however, after that, you will feel even worse.
I believe in moderations, if you want to play, enjoy can, but don't
strain lor.
cause if you sick, it will rob you of normal activities like in
soccer, you can't really go all out..
you want to play, can.. make sure you got extra clothes after game
to change.
and plenty of fluid.. and then rest well.
