Lately, when I see a student with low energy the first culprit that I suspect is their diet. Dancers are artists who use their bodies like athletes. Dancers and Athletes alike must pay closer attention to nutrition and to their bodies than the average person. The energy and stamina required of the body in order to meet the demands of a strenuous class or workout is doubled and even tripled. What your body wants while it is under such stress is vitamins and minerals and other valuable nutrients that are so abundant in fresh vegetables and fresh fruit.
Protein is important for stamina.
But don't be fooled by companies promoting protein bars. Most of these bars have enough sugar in them to rob them and erase most of the benefits of the vitamins, minerals and protein that they so proudly tout. Look at the label. Let's be perfectly clear here. Sugar is white table sugar, brown sugar, honey, maple syrup, corn syrup, sucrose, and fructose.