The 19th century Sritattvanidhi describes and illustrates the pose. The name, and the more general name Yogasana which may denote a variety of similar poses, is found in much older documents as a meditation seat, such as in the 4th century Darshana Upanishad.
While opening the hips and lengthening the spine, the asana's relative ease on the knees makes it easier than siddhasana or padmasana for people with physical difficulties. Some schools do not consider it to be as effective for prolonged meditation sessions because it is easy to slump forward while sitting in it. For meditation, it is important that the spine be straight and aligned with the head and neck. But if the practitioner steadies the sukhasana pose by putting pillows or blankets under the knees to create a steadiness, it may be easier to sit longer in sukhasana for meditation without slumping forward. An additional blanket or pillow under the buttocks may also be beneficial and steadying. The 20th century Jnana Yoga guru Ramana Maharshi advocated it as suitable for attaining Enlightenment.
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