Even without having a c/s - I had to take it easy getting back into exercise. I actually trained with my junior netball girls about 10d post birth, and I bled very heavily afterwards. I then found out that its not a good idea to get back into it too quickly.....
I had my first senior training about 6w post baby, and played that week. It was OK. I was pretty puffed, and the boobies were pretty sore (cause they were squeezed into my prebaby sports bra ) but it was OK.
With c/s I would suggest putting the whole thing back by a few more weeks. But your dr will tell you more.