Refers to the ability of your body systems to work together efficiently to allow you to be healthy and perform activities of daily living.
This "Principle" is great way to monitor a fitness program , is commonly used for exercise prescription, and can be used to create workouts that meet your goals and fitness level.
The ability of muscle to continue to perform without fatigue (perform repeated contracted against resistance)
Refers to your body's ability to efficiently and effectively intake oxygen and deliver it to your body's tissues by way of the heart, lungs, arteries, vessels, and veins.