This really depends on where your snake is.
Its an extremely bad idea to keep your snake in the room where you dance around and work out. A better place is in your bedroom, or closet, where theres not much traffic or action to stress him out.

Definitely one of the main problems that causes stress in snakes is from too much traffic and noise. They are much more sensitive to vibrations than we are. If they have a hide, the light shouldn't be TOO much of a problem unless your constantly in and out of there.

So basically, it could cause stress, which can cause a bad shed/difficulty eating/weight loss/ect.