Which one of the following statements about muscle is most accurate?

a. it weighs less than fat.
b. it weighs more than fat.
c. its weight in relation to fat depends on a person's fitness level.
d. it weighs the same as fat.

C. is the correct answer.  The amount of muscle versus fat in a person's body is strictly individual to each person and their individual fitness level.  For some people, their body fat percentage is much higher than muscle and for others the opposite is true. It just depends on the person.

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Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle