"Postural muscles" refer to the muscles in our body that help us maintain a stable and upright posture, such as sitting or standing straight. They provide support and help us stay balanced.
The position itself forces you to use important postural muscles in a safer environment closer to the ground. (onnit.com)
After keeping a consistent daily workout routine, you will notice improved body balance and good control of postural muscles extending from the ground up through your scapula and shoulder girdle. (hab-it.com)
But practicing Sukhasana regularly can release the hips and groins, strengthen core postural muscles, and even soothe frantic nerves. (yogajournal.com)