The shorter answer: No, while you don't have to exercise to experience weight loss with Regains, we still absolutely recommend exercising while taking it to experience all of the other positive benefits. A very important caveat is that you still have to consume less calories than your body uses. Regains can increase the amount of calories the body uses, thus making weight loss a little easier.The longer answer: You lose weight when you consume less calories than what body uses in a day. The calories used in a day is your Total Daily Energy Expenditure (TDEE). The Regains formula helps to increase the body's natural production of human growth hormone (HGH). Studies on HGH show that it helps to increase metabolism and thus, increase TDEE. In a calorie deficit (eating less calories than you use), Regains has also been shown to help the body burn fat over carbohydrates. This is why Regains can be helpful for weight-loss. But again, it is still crucial to monitor and control calorie intake in order to experience this! And of course exercise helps this entire process by burning calories. This is why we recommend some form of exercise and activity, even if it's just a few laps around your neighborhood or some bodyweight squats/push-ups throughout the day at home.