Autumn is a time where the yang/warmth of the sun begins to lessen and give way to the yin/cooler seasons of fall and winter. In autumn one must begin to store vital energy in order to make it through the winter in a healthy state. One must slow down from the sometimes frenetic activity of the summer. The movement of autumn in Chinese medicine is downward, and this is evident in the root-based vegetables that are available during that time. These veggies reach down into the ground to acquire their energy which we consume to acquire that energy.