He has lung issues and should do at least an hours exercise everyday.
This has always been an issue because he is 'tired'; but he was doing tennis (with OAPs) twice a week, badminton once and dancing twice. But there are some days he does nothing.
My mum bought DH & DD a Wii at Christmas & now he spends at least 3 hours a day exercising.
It's fab
(he still does his other stuff, phew)