Yoga is the art of balance and harmony. Balance in how we interact with ourselves and others, balance in what we eat, think and do and ultimately balance in how much we sleep as opposed to how much we wake. The Bhagavad Gita offers, Yoga is harmony. Not for him who eats too much or for him who eats too little; not for him who sleeps too little or for him who sleeps too much.
The ancient yogi seers classified sleep as one of the four fountains for survival (sleep, sex, food and self preservation) and if sleep is out of balance we tend to over compensate with one of the other fountains E.G. we may overeat. Interestingly it was found that if you got less than 5 hours sleep a night on a regular basis you were more likely to be heavier than those who ate more and slept more. Read more