I stumbled across this article about Yoga and thought I would pass it along. I have been practicing Yoga for about 4 years now. During this time I have gone as long as a month without and found that my weight shot up, my patience lowered, and I felt over all horrible. However, within a couple of days of starting up again my mood would improve substantially and life took on a cheery outlook again. I simply can not say enough about this stretching exercise of relaxation and meditation.
