The most effective exercise is the one that gets done. You will benefit most from your workouts if you schedule them at times convenient for you. On the other hand, there are two distinct schools of thought about exercising during fasting. The first benefit is that you will be able to burn more of the fat accumulated in your body if you exercise while fasting (preferably near the end of your fasting window, just before you break the fast). Some evidence supports this notion, while other research has indicated no correlation between fasting and increased fat burning. If shedding some pounds is one of your primary objectives, you may want to give this strategy a go. Alternately, you can feel horrible if you attempt to exercise on a stomach entirely devoid of food. You may have more energy to assist you in pushing through your exercise if you schedule it within your eating window (after one or two meals). If you are engaging in an endurance activity, it is highly recommended that you take this strategy and have a well-balanced lunch before beginning your workout.