For example you could be super in shape from a muscular perspective but have really bad cardio and vice versa.
How is cardio different from physical shape and what exactly happens in your body that makes you have more cardio?
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Think of your body like a city.
Lifting weights = building muscles = building housing and facilities in the city.
Doing cardio = building your cardiovascular system = building highways and transits and terminals to move people around.
No city survives if you have a million condos but no transit and small, pothole-filled roads.
No body survives very long with lots of muscles but terrible cardiovascular system to support it.
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