Happy Baby pose
The happy baby pose is a really comfortable and effective exercise also known as Ananda Balasana and you can do it every morning right after you wake up. So, all you need to do is lie on your back and bend your knees into your belly then grip the outside of your feet with your hands. You should try to be comfortable, so you can grip your ankles, and if you can’t then try to grasp your insteps. You can also flex your neck to release the tension (touch your knees with your forehead).