Of course playing badminton is good, but those above 40s, please
take care of your knees.
Those that got no time or got plenty of time like me, can go
jogging or walk walk, or jog and walk after your shift around
geyland and joo chiat, it is own time, own target, if see target
gum, can do other exercises, letting yourself free and easy is
good.
My knee if weak it will not caused by badminton , it will be
something else . . . . hahahahahah
Ask Komade , his knee recently very weak .....

This firing position u think knee will weak ?