Any surgery is like your body has been hit by a truck, no matter how minor.
I remember going out and walking on the school track about 5 days after my first son was born. I had lost a lot of blood during the delivery; so much that the pediatrician told me I looked like death! And I was shocked that a simple walk was making me dizzy. All I could think about was getting back in shape and losing weight. I went back to the gym after 2 weeks and made myself sick doing aerobics.
I learned my lesson. The body has a way of telling you when you need to go slowly.