5 Absolutely Healthy and Perfect 4 p.m. Snacks

The right pre-exercise snack will give you the energy to attack those hills, to digest easily (so you can avoid cramps) and will not fill you up so much that you don't want to eat a healthy dinner when class is over. Half an energy bar (just not high-fiber, which may cause a detour to the bathroom; and again, check the label for added sugars before you take a bite), one banana, one cup of applesauce or a few chocolate-covered pretzels (the small amount of caffeine and sugar will give you a boost) are ideal foods to keep in your gym bag.