1.the ability to use your muscles to push, pull, lift, throw, or kick. When you lift a heavy box, play tug-of-war, or do push-ups, you need it. Doing pull ups or quickly going up a flight of stairs helps improve it.
2.the ability to use your muscles for a long time without stopping. Pulling a person or a pile of newspapers in a wagon for 30 minutes can improve it.
3.the ability to bend and move your body. It helps protect your joints from injury. Stretching, dancing, and gymnastics are physical activities that improve it.
4.the ability to stay active without getting tired. Activities that make your heart beat faster for a period of time ; swimming, bicycling, jogging, shoveling snow, or mowing grass for 30 minutes without stopping all help improve it.