Quote Originally Posted by Snakey
Even when ive been fit i have never been able to jog coz i have bad joints in my ankles. So i stick to walking about 6 kms a day and i do some bike riding.
that's fine, not saying you have to jog - it's just often the most readily available & cheapest exercise, not everyone can afford a decent bike/gym membership but most of us can put on some running shoes and hit the road.
I've got dodgy knees through martial arts so I mix it up, if people push themselves swimming is a great exercise, as is the cross trainer.

Alex - great post.