The warm-up? Check. The workout? Check. The cool-down? Ah ... forgot that one.

After you finish your high-powered cardio or weight training, your workout is still not done, I'm afraid. The oft-forgotten cool-down period plays a significant role in returning blood flow and heart and lung function back to their normal state. It also helps prevent blood from pooling in the muscles you were working, something that can cause dizzy spells or even fainting.

Spend about five minutes walking at a very easy pace. Remember, the point here is to help blood vessels relax and cardiac function return to normal, so take it nice and slow. Adding some stretches as part of your cool-down is also a good idea, though it's best to do it after finishing the short walk.