Daily physical activity. how do i tell my boss i need to sleep rather than do that?

See doctor/be smart.: You can do activity, as long as it can be done without health risk. It might be smart to see your doctor to get an idea of how fit you are, and what actifvity you can do, and why you need sleep. But simple activity can be done, like light bending exercises for 5 minutes before bedtime, without interfering in sleep. You don't have to tell your boss anythng if you think there will be trouble.