In this world, there are many ways to exercise. Some are actual sports; others are specific types of exercise; all will make you sweat, somehow. We have ranked them in scientific order, based on the following criteria: Physical Difficulty; Amount That You Would Be Humiliated If You Tried to Just Waltz In and Do Them Like Some Big Shot Because You Thought They Would Be Easy; and Overall Hardcoreness. Fake bullshit sports are not included. All rankings are final.