Too little or too much sleep can make a big difference in how you feel.
Even if you get more than enough hours of sleep, you might find yourself dragging the next day if that sleep was interrupted by frequent awakenings or was of poor quality.
Less sleep is without a doubt bad for your health and has visible effects.
Research shows a connection between too much sleep and too little energy.
It appears that any significant variation from normal sleep patterns can upset the body's rhythm and can have visible drastic effects.
What’s the best practice then?
figure out how many hours of sleep are right for you and then stick with it — even on weekends, vacations, and holidays