We would discuss about two types of people, those who have excess fat in their body and those who have only bones covered with their skin. Both these categories of people need exercise but different type of exercises. But, the energy levels would be less in both these people for different reasons. The people with excess fat would feel very lazy and hence could not do the exercises. People who are lean would not have sufficient energy to do the exercises. Though they eat lot of food they could not build the muscles because of less exercise, eventually the food they eat would convert into fat and they would become fat people.
On the other side, the fat people would not be able to melt the fat and would only develop leg and hand pains because of the exercises they do. So the right solution for this is to use the supplements that help them melt in the fat by doing the exercises and thereby reduce the fat. Once you read the testogen review you would be able to understand that the lean people need this very much for the reason that it increases the hormone levels that are required for creating new energy in them and thus help them eat more and exercise more due to which muscles build up very easily.
Once the muscles are build you could relax and then go with simple exercises so as to maintain them. You could even stop taking the supplements or else reduce the dosage depending on your situation. The physical trainer whom you have appointed or the doctor whom you meet regularly would be able to suggest as to how to continue with the use of the supplement that helped you to solve the excess or less weight problem you are struggling with.