You should be able to continue a normal, active life. People still swim with an ostomy, so I see no reason why you can't continue to play sports. There's NO restrictions on what you can or can't do after an ostomy I want to also talk a bit about the "bags" itself. I was given the one piece. That's all my home care nurses put on me. It was all I knew. Then one day I was in a forum, when someone mentioned the two piece. Wotj the one pieces, you have to drain them, which can be messy, and not to mention, stinky. I switched to a two piece, and never looked back. The advantages are that they are disposable, NO draining needed. With a one piece, when it fills with gas, there's no way to get the gas OUT unless you unwind the bottom of it. With a two piece, you simply lift where it is connected to, and the gas releases, then you snap it back in place. Done. And one last "PLUS", is that the ones I use are like a "mesh" material, and you can't SEE THRU IT! So you don't see the "output" So you might want to consider the two piece. SO much better!
Best of luck with your surgery, and your sports playing! You will be just fine!