Regular snacking is vital to a healthy and active lifestyle. Fitness-friendly snacks should be quick, delicious, and balanced to satisfy your exercise and nutrition needs (as well as your hectic schedule). Active women should aim for snacks in the 100- to 200-calorie range (active men may need a bit more) and keep in mind, you may need to eat up to two snacks a day between meals to keep your energy levels steady all day long.