Re: L5S1 post surgery
If you are doing all your walking in one jaunt, it may be that you are doing too much. You may be irritating the nerve by the duration of the walk. The purpose of walking in the period immediately post surgery is to stretch out the spinal nerves. This helps to keep scar tissue from attaching to the spinal nerves as it forms and fills in post surgery. This is best accomplished by taking frequent short walks during the course of the day.
You are still very early in recovery. You are very lucky if you have almost no pain at this point. I would urge you to use caution because once the nerve or nerves are irritated, it can be very difficult to get it to calm down again. Once any inflammation gets going, it is difficult to get it down again. Remember that even though bone growth may start early, it takes a good twelve months for the bone to "cure" and set up to the point it is hard and durable.
The first six months are the most crucial in terms of the ultimate success of the fusion....Just try to keep that in mind as you plan your activities, job, family obligations, etc. and don't allow yourself to do too much, even if you feel terrific. It takes energy to grow new bone cells...so rest is an important component of recovery.