“The importance of getting enough sleep just can’t seem to be repeated enough times. The recovery time is just as crucial to your muscle as the nutritional part as well as the actual workout is.
Without the proper amount of sleep, the muscle will end up in a catabolic state, which means the muscle will break itself down during and after the exercise.
The body releases a lot of essential hormones for muscle recovery and muscle growth while we sleep. Without proper sleep, we cannot function for very long, not physically nor mentally. Our body is depleted of important nutrients such as vitamins and minerals, if we are sleep deprived.”
http://www.teamflex.com/weight_loss_lifestyle/proper_sleep.asp