Don't be in too much of a hurry...it depends how you and your body heal...in other words...Walking, fine. Incline, low.
Lifting? Push-ups? Jogging? Some people are just great but others encounter problems and there is no hard and fast rule either...I was in good shape, worked out constantly and thought that I was Mighty-Mouse...started doing the stair master at 6 weeks. Had my first every hernia within 1 week. Surgery. 8 weeks post op next time, started doing a light work-out. Hernia...happened to me 5xs...so my new rule is, 'this is for the long-run, not the short term...What does it hurt to wait a little longer?'