Fitness-word definitions?

What are the definitions for the following words:
Isometrics
Plyometrics
Stamina
Cardiovascular Fitness
Fitness
Explosiveness

isometrics - strength training where the length of the muscle stays the same eg. a squat against a wall
plyometrics - often used for flexibility, where explosive movements are used to increase length of muscle eg. stretching with bouncing movements.
stamina - the capability of sustaining an effort
cardiovascular activity - exercise whereby the heart and lungs are used for long-lasting stamina
fitness - a state of health and well-being or the ability to do an activity
explosiveness - the rate at which energy can be rapidly released

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