Compare and contrast the differences in a persons cardiovascular fitness between an exercise program that utilizes the progression principle and one that does not

In progression principle the cardiovascular fitness will improve and keep improving, while the other person will have a ceiling on improvement.

Explanation:

Exercising is benfical in most of the cases, if yu exercise some days a week your cardiovascular health will definetly improve, but when you do the same routine day in and day out your body gets used to it and stops improving its condition, while with progression principle you get different difficult levels in different grades through the days and you continue to improve your cardiovascular fitness.

answer: d is correct

you may having too much sleep.. a good night sleep consists of about 7 hours. more than that could be the reason you're still tired throughout the day.