keto lean 360 to lose weight you need to do some kind of aerobic exercise five days a week for 20 minutes. That is enough to get your heart rate up, and to raise your metabolism so you can burn more calories even several hours after you finish exercising. Everyone agrees that one of the best ways to do this is walking, but you are not limited to that. Running, swimming, dancing, and cycling are just a few others. You don't have to pick just one either, you can mix it up. Variety in exercises can be your spice of life.