Regular practice of Halasana (Plow Pose) rejuvenates the body’s entire system. Halasana helps nourish the thoracic and lumbar regions of the spine by increasing circulation and suppleness, releases tension in the neck and throat, alleviates the accumulation of phlegm or mucus in the sinuses and respiratory system, and gradually assists in lengthening and regulating the breath.
(Yoga Journal Daily Insight, Aug 5, 2011) http://www.yogajournal.com/poses/479?utm_source=DailyInsight&utm_medium=newsletter&utm_campaign=DailyInsight