Scuba divers gather on a boat as a man speaks. We see several fish and a shark. the scuba divers

dive, looking at the fish and waving at the camera.

How to condition your body to need less sleep
Exercise.
If you expect to function without sleep you'll have to build up your body's overall strength. Exercising three or four times a week can build your overall strength and stamina, resulting in you needing less sleep.

Focus on aerobics, like running or jogging, swimming, as well as mild weight training, such as lifting weights, doing push or sit ups, and pilates. Exercise in the afternoon is ideal as your overall sleep quality at night improves.

How to treat avascular necrosis
Rest.
Decreasing the amount of stress and weight on the affected bones will result in a huge amount of pain relief, slow the damage rate, and give your body a chance to heal. Apart from physical therapy, make efforts to minimize your daily physical activity movement as much as possible.

You may need the aid of crutches or a walker if the affected joint is your hip, knee or ankle. Consider crutches an invitation to stay off your legs.

Two men are standing in the woods. they
pick up wood and set it on a tree stump.