Are more accurate than pedometers at tracking distance a  heart rate monitors b  blood pressure monitors c  gps fitness monitors d  calorie counters

The answer is C) GPS fitness monitors

GPS monitors track your location over time, which is a better way of measuring distance traveled than a device that measures the number of footsteps you've taken.

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