That may be because evening people show increased motor cortex and spinal cord excitability in the evening, about 9 p.m., meaning they had maximal central nervous system drive at that time…Morning people, on the other hand, never achieve this level of central nervous system drive because the excitability of the motor cortex does not coincide with the excitability of the spinal cord. In other words, these two measures never peak at the same time.
From a new study on Early Birds vs. Night Owls. (via Lifehacker)
I have tried to explain to my Early Bird friends, that no matter how tired I am ALL DAY, the moment 9 or 10pm hits I “wake up.” Suddenly I don’t feel tired and I putter around being productive. I could easily ride out the wave til 1 or 2am when I don’t have to be up early the next morning. When I do have to be up, I force myself to sleep around 12:30, and always fall right to sleep.
