Halasana or plow pose is a common pairing with shoulderstand or salamba sarvangasana. Plow allows a deep flexion of the spine and opening that supports the eventual lift into shoulderstand. One should be cautious, particularly if you’ve not performed this pose previously. Go slow, walk the feet back and take your time. Your breath is more important than the depth of the posture you achieve.
The pose helps the thyroid, parathyroid and the digestive tract due to pulling the belly towards the spine. Additionally you can get a hamstring stretch and the benefits of a partial inversion. Use the mats or blankets as shown in the video. I used to loathe both plow and shoulderstand due to attempting the pose without and feeling strain on my cervical spine or neck.
Plow is an excellent addition to a vibrant energetic practice. It’s calming to the nervous system as is common with forward bends.