The effects of core stabilization exercise program in obese people awaiting bariatric surgery: A randomized controlled study

•The CSEP improved functional capacity in obese people awaiting bariatric surgery.•The CSEP yielded an improvement in physical fitness in morbidly obese.•The CSEP provided decreasing in fatigue severity and symptoms in morbidly obese.•Adding CSEP to physical activity counseling increased physical activity in obese.