How soon after surgery can I start working out? What about other physical activities, such as driving and sexual activities?

After a laparoscopic gastric bypass, two weeks is generally enough time to be off work. You should avoid driving for about 7-10 days. Other physical activities (including sex) are fine, with the exception of physical exercise involving the abdominal wall muscles, such as sit-ups or abdominal crunches. They should be avoided for about 4-6 weeks.