Centrifugal force can be used to simulate gravity in space vehicles.
Assume the "gravity" in our space vehicle can provide environments ranging from 2 gravities to none (micro), either by changing locations on a large vehicle or by changing the spin of a smaller vehicle.
Sleeping in low gravity might be more comfortable, and if you are spending a lot of time in low gravity, exercising in higher gravity might get you more benefit in a shorter time.
If I have the option to very my gravity at will, what minimum and/or maximum time limits should I set per day?
Related: