In general, when I do an excision with sutures (stitches), I tell my patients to take it easy for at least a week, and sometimes even a second week (depending on the location and size of the excision). It is very important to avoid intense exercise and any heavy lifting to minimize tension on the wound as it heals and to minimize swelling in the area. If you are having a lipoma on the abdomen removed, it is likely going to require several sutures and it would be in your best interest to avoid exercise and heavy lifting for a good 10 to 14 days. It is worth it in the long run to get the best cosmetic outcome and to avoid any infections or wound dehiscence (wound opening).