Keeping fit is all about developing good habits and as far as exercise is concerned, it's never too late to start. From running in your twenties to TaiChi in your sixties, fitness expert Joanna Hall offers advice on the best activities for you.
Hannah Pool: I am not, nor have I ever been, a nail biter. Thumb sucker, yes, hair twirler, yes, but biting nails has never held any attraction for me.