Select the correct statement: A Cardiac muscles have shorter absolute refractory period than skeletal muscles B Cardiac muscles action potential has a characteristic plateau phase C Cardiac and skeletal muscles have a different sliding mechanism of muscle contraction

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People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.