The best hip openers and why you need them in your practice! A hip opening pose is a yoga posture that stretches the muscles around the hip joint and pelvis, including the buttocks, hamstrings, inner thighs, groin, and abdomen. These muscles are often tight from long periods of sitting, which can lead to lower back pain and other issues. By stretching and strengthening these muscles, you will be able to move more freely and comfortably through your poses, as well as have more mobility and range