Seated Straddle is an active pose, but it will also prep your body for sleep:
- From Butterfly Pose, allow your legs to straighten out into a straddle position with three to four feet between your heels.
- Make sure your toes and knees are pointing straight up. Sit with a tall spine or slowly fold forward at your hips, pressing your belly button and chest forward to prevent your back from rounding.
- Either support the weight of your torso with your hands on your legs or feet, or rest them out in front of you.
- Hold for 10 breaths.
Read here for a variation that targets one hamstring at a time.