Releases the psoas, which is part of a group of muscles called the hip flexors. Tightness of the psoas can result in lower back pain by compressing the lumbar discs
How to do it: Come onto both knees and step your right foot forward. Make sure to keep your right knee over your heel and your left knee directly under your hip. Reach your left hand up toward the ceiling. Make sure to keep both hips facing forward and glutes engaged. Take deep breaths the entire time.