Sleep Curve

A relative curve to the ratio of energy you have and amount of time you spend sleeping. The curve suggests the optimal amount of sleep is 8 hours and too much more or less sleep will lower the amount of energy you have.

Person 1:Man I am so tired even though I slept for 12 hours

Person 2: Well if you look at the sleep curve 12 hours is too much and you actually don't get much energy for sleeping that long.