Staying physically fit is good. You need to stay physically fit as much as you possibly can. How much - there's no black and white answer to this, but if you're getting caught up in sport to the degree that you have to win, that's going to be too much. If you're doing sports to stay physically fit, that's the better intention.
Now there's another intention why we often do sports for, and that is to share moments with our friends or our relatives. Throw the Frisbee together at the beach, whatever, sharing time. So that could be another motivation. But once again if we bring in, "I want to win, I want to be the best", of this or that, then we're missing the proper motivation. But if we're doing it to be with friends, if we're doing it to physically exercise and keep in shape, good.
Now as to too much, some people get carried away with too much sport. It can be addictive. The adrenaline hit can be very addictive and I know that as a fact. One of my old college friends used to run marathons and he became addicted to it. So much so that sometimes when it hurt and when he had tons of blisters, he still put on his sneakers and he still ran. It became the same as an alcohol addiction and everything else, and he actually had a nervous breakdown from it. So there can definitely be too much if we're addicted to the adrenaline rush that comes from it, but to stay physically fit and strong that's very good.
The Buddha basically exercised almost every day. He walked. He walked long distances. Sometimes he would walk maybe 20 miles a day because he was on a journey back to his father. So he would walk, from town to town, town to town. The monks in general do 1 or 2 km or miles walking a day, depending on how far they walk to get their alms food and then coming back. The monks here get an extra exercise for their physical health. Up and down the hill, I should say down and up the hill, and down with an empty bowl and up with a full bowl. So they get a little extra. They use the physical exercise that the monks do in the sense of walking and carrying some heavy weight on the way back.
So it's not a black and white matter and motivation has to be there in the sense of wanting to keep a physically fit body, so that you stay healthy, so that you stay strong. If your body gets too weak, if your body gets ill and diseased because you're not maintaining it then of course a lot of your thoughts are occupied with your body instead of your meditation practice. You have to be careful about that. In the same way that we don't want to get caught up in, "I have to have a perfect body." because the thoughts then are always very materialistic. But to keep it strong and fit is very good.