Endorphins can reduce stress and are natural painkillers. question 3 options: true false

I believe it is true.

That would be true. Endorphins are released in the brain and can reduce anxiety for an example. For example They can be released when doing something that satisfies us like kissing or cuddling

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