I was coming here to make a thread, and here there is one already!
As well as sports, I thought people can say about exercise (and health in general if you like ^^), because not everyone plays sports, and some things are 'exercise' but not considered as a 'sport', but it's still interesting maybe to find out how people stay in good health.
As for me... I used to go to the gym; I went for about 2 years and really love it, I like to use the treadmill, rowing machine and weights the best.

I was aiming to gain some weight... but I actually gained more than I bargained for! >< (going from 105 pounds to around 133!

) so I decided not to do so much exercise... so I stopped going so often to the gym, and lost about half of that extra. ^^
But I still need to do exercise... I am both lucky and unlucky in that I have the kind of body that really needs almost constant exercise (short, stocky, heavy in muscle but can't afford to carry any extra weight -_-) and I have a sedentary job. (If I was a cavewoman I'd be laughing; not so good for an Office Lady! T_T) I do quite a lot of walking but that's not really enough.
Also, the gym is a bit expensive for me; it's difficult to afford it.
I like to dance!

... and that's not really classified as 'sport'... hehe... but I guess you can say it's 'exercise'. I dunno if what I do could be graced by the title 'dance'... XD... something like 'expressive movement' probably fits the bill better, except that sound well pretentious!

Anyway, I do 45-60 minutes of dance on most days, because that's something I can do at home and it doesn't cost me anything.
I used to do a lot of cycling up until I moved to the city, and on my vacations I still like to do this, but sadly it's over a year since I went on a cycle camping tour.
I'm unlucky in that none of my friends are sporty at all, so I can't do stuff like play tennis with them, even though I enjoyed it at school. PE was one of my (few) strong subjects, my favourites were hockey, gymnastics, tennis, badminton and swimming. I wasn't very good at netball (gahh that sucked! ><), it was boring and I was too short... XD