I had my gallbbladder taken out last Feb, laporoscopic proceedure, and was anxious to get some gardening in, so I ran a tiller the week after my proceedure and raked out the garden beds the next day. I regretted that move for days.... rest for at least 2 weeks. You will not lose any conditioning in that time frame.
In all reality, this is really a question you should ask your surgeon... then follow their advice.