The second most common injury we see in the yoga world is of the hip. The damage happens when the hip bends (flexes) significantly. The thigh bone can bump against the bone of the pelvis and hip socket, crushing the cartilage there. This is called hip impingement.The injury generally happens in three progressive stages that may take months or years to develop. In the first stage, there is a slight or moderate pinching sensation as we pull the leg into the chest or rest the body onto the leg with gravity. This pinch is not the result of muscular engagement or tissue stretching, but of bone resting on bone and squishing the cartilage between. (There is a somewhat common instruction to ‘feel a pinching sensation in the hip’ in some postures. We recommend against this, for obvious reasons.)
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In the second stage, after we have pinched the front of the hip repeatedly for a long period of time, probably months or years, the hip cartilage starts to be damaged enough to become inflamed and painful. So the pinch will become sore or sensitive. And the inflammation can affect the function of the muscles around the hip, especially in the front of the thigh. The quadriceps and sartorius (on the front of the hip and thigh) will start to feel weak and tight.
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Common postures that are in danger of causing this injury are those that involve deep hip flexion, which is bending of the hip joint. These include Wind Removing (pictured above), Bikram Triangle, Standing Bow, Half Tortoise, Separate Arms Balancing Stick and Spinal Twist (Ardha Matsyendrasana). Look at the position of the hip in all these postures. Notice that the deep flexion can cause the thigh bone to bump into the pelvis.
Bikram Triangle
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Standing Bow
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Half Tortoise
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Sep. Arms Bal. Stick
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Spinal Twist
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Anytime we use the arms to pull the leg deeper toward the pelvis, use great care! This is taking the hip joint past its normal range of motion, and is a common way to injure the hip. In most (perhaps all) situations, pulling will increase the risk of injury.
Healing damaged hip cartilage is difficult. If you are only in Stage 1 or Stage 2, backing off of the postures will likely allow the body to heal. You will need to be conservative with the hip for awhile, at least six weeks. If you have a torn labrum, the conversation gets more complicated, as most will recommend surgical repair. The cartilage doesn’t have a great blood supply, so it has trouble healing on its own. There are some stories of non-surgical success, but they are few and far-between.
For us, the moral of the story is to be careful and gentle. Most people practice yoga to improve their health, and injury is the exact opposite of that.
