The volume of rest that a person needs is determined by various factors. One important factor is the type and the volume of food that you consume. You must experiment with different types of foods, see which ones make you feel heavy, and leave you light and agile. If you make sure that at least 40% of your diet consists of fresh vegetables and fruits, there will be lightness in the body.
What the body needs is restfulness, not necessarily sleep. It is a misunderstanding to think that sleep is the only way to rest. Even as you sit or stand, you can either be in a state of restfulness, in a state of agitation, or in a state of inertia. If you are in a lively state of restfulness, every moment of your life, the volume of sleep you require will decrease.
