Yes, but workouts should be much lighter. This means no heavy weights, no long runs, marathons, burnouts, or long sessions of strenuous sports. There is nothing wrong with elevating your heart rate and breaking a sweat, but over-exerting yourself on limited calories may cause you to feel stressed, hungry, or even cause you to break your Cleanse. If you do decide to work out, remember to drink about twice the water and electrolytes that you normally would.