If you want to lose weight, exercising in the morning is ideal because our muscles are relaxed and metabolism is slower. Aerobic exercises are the fastest way to burn fat with cardio exercises, such as jumping. It is important to warm up before exercising, in this way you give your body a chance to go toning complementing with force exercises. In the morning our metabolism is accelerated by doing exercise and the advantage is that the level of glycogen is low this happens because of the lack of food (last one you had was probably 8 hours ago or even more) and since you have not consumed any food, your body will use accumulated fat as fuel, however the warm up must be stronger than at any other time of day because the muscles are not ready and they are more susceptible to injuries. Doing exercise in the morning is more effective to lose weight this is due to the fact that it does not come in the way, you do not have to stop any activity to do so, and most of the times and this makes you have better discipline than any time of the day. As for your energy it will be greater for the rest of the day.