Select the three sports that do not require beginners to have a high level of fitness:
A. Free diving
B. Dog sledding
C. Bungee jumping
D. Sky diving
E. Hiking
F. Rock climbing
Look at the pictures for the answer

I’m a little confused if the picture already gave you the answer, but here is what I would answer.
Answers: bungee jumping, sky diving, and hiking
I hope this helped!

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