Yoga can be great for relaxation, in addition to improving your overall health and well-being. This one move is an instant de-stresser, great for doing right before bed.
It's called "Reclined Twist." You relax in the pose while holding your bent leg towards the opposite side. The video above shows a variation of the pose, where your knee is upright; in the traditional pose, your knees are stacked over each other and against the floor, as this (much longer) video demonstrates.
You can lie in it for ten deep breaths on each side or for ten minutes, if you wish.
As Bottom Line Publications points out:
This simple twist releases tension in the spine, hips and back, which can interfere with a good night's sleep. The deep breathing helps you wind down, allowing you to release worries.
I find it also helps with achiness in the shoulders and neck (especially if you turn your head to the opposite side of the bent knee), and Yoga Journal says it can help cure a sluggish digestion (by wringing out your insides, I guess) and low energy. Don't worry, though. It's not too energizing and might help you catch more zzz's.
Beginner Yoga Positions: Reclining Twist Yoga Poses | YouTube