A randomized trial comparing two interventions to increase physical activity among patients undergoing bariatric surgery.

Objective: To test the effectiveness of two levels of physical activity interventions before and up to 6½ months after bariatric surgery.

Methods: Before surgery, individuals completed submaximal exercise testing on a treadmill. After random assignment to standard care, pedometer use, or exercise counseling plus pedometer, participants wore an accelerometer for approximately 2 weeks and returned it to the bariatric center before surgery and 2, 4, and 6 months postoperatively.