i think it is important to be up walking immediately to decrease your risk of blood clots. of course, you won't be walking a lot in the first few days but it is important to be up moving. there is also no reason you cannot walk upstairs.it really depends on how your are progressing and this is something that needs to be discussed with your surgeon about when you can start doing hard long walks and cycling.i would suggest you could be walking miles at a fast pace after about 2 weeks and probably start a spinning class after maybe 17 days. i would hold off street cyclinguntil you are 3 weeks incase you fall off your bike.it is great that you are already thinking about getting back to being fully active.david berman md