Have problems falling asleep and waking up? Some people experience this quite a bit and it can all be looked and explained by your body's natural circadian rhythms. A MEQ-SA (morningness-eveningness self assessment) is a good way to test yourself to learn more about your own internal clock.

The 19 question quiz will help you determine if you're an "evening type" or a "morning type" or an "intermediate type". The questionnaire basically helps you estimate when your brain starts producing melatonin to help you fall asleep easier and when your "natural" bedtime is.

View the questionnaire in whole on Scribd or take this automated version. They also offer tips to train yourself to become a morning person and to reduce oversleeping or to deal with seasonal effective disorder.

[Center for Environmental Therapeutics via Ben Greenfield Fitness]