Negative thoughts are heavy, compulsive and pervasive, leading to weak memory, poor decision-making skills, and lack of enthusiasm. Our vital energy (prana) gets trapped in our conflicting belief and emotional patterns, and the more the prana gets stuck, the less we have at our disposal. How can yoga help release the stuck energy and overcome this kind of exhaustion? Such negative thoughts/emotional patterns could precipitate illnesses in due course, if not dealt with appropriately.
A few simple breathing techniques coupled with yoga, can flush out tiredness and infuse new energy into the body.
http://lifepositive.com/reboot-yourself-with-yoga/