Draw your arms out long in front of you, and let your forehead rest on the floor for Child's Pose. If you're working with sore muscles, you'll feel this stretch all over your body. As you breathe deep, let your hips sink closer and closer to your toes.
For a more intense shoulder stretch in this restorative posture, crawl out your fingers even further away from your body until your forearms are off the floor and your arms are actively engaged.
Source: Laughing River Yoga