From The Energy Project: Our most fundamental need as human beings is to spend and renew energy. Instead, in a world of relentlessly rising demand and chronic overdrive, most of us spend far more mental and emotional energy than we adequately renew, and far too little physical energy to stay fit.
The average American gets just over 6 ½ hours of sleep a night. In fact, more than 95 percent of us need between 7 and 8 hours to feel fully rested. Great performers, from musicians to athletes, average as much as 8 ½ hours of sleep a night.
It’s during sleep — deep, sufficient sleep — that our bodies not only renew and recharge, but also repair themselves and grow.