You may not feel like doing much for a few days post-operatively. Although after the first three days you may be up and about, walking around thinking you are feeling fine. But in reality you are still able to take your pain medications and have the option of lying down if need be. If you are at work and must work for 8 hours - or even half of that - the option of lying down and popping a few pain medications is more than likely ruled out. Just be sure that no matter what you do, do not lift anything over your head (including your arms) for at least 10 days or until your doctor specifies otherwise.
No strenuous activities, including hard labor or exercise, for at least three weeks. In some cases, you are not allowed to have sexual relations until at least 7 days, post-operatively.