1. Strength - How much you can push, pull, lift, throw, move, and generally shove around. It's the total amount of pounds moved in one motion.
2. Endurance - How long you can do steady motions. Swimming two miles, running 8 miles, biking 20 miles straight is all endurance-based exercise.
3. Flexibility - The ability to move your muscles around and ease your body into different positions. Having flexible muscles, tendons, and ligaments prevents injuries and helps you do things more efficiently.