Body differences. Compared to men, women have a wider pelvis, a smaller ACL, a narrower area containing the ACL (femoral notch), and a greater degree of the knees pointing inward (genu valgum or knock-knee). These differences increase the risk of an ACL injury, especially when landing from a jump.
Muscular differences. Compared to men, women have less muscular strength, use the muscles in the front of the thighs (quadriceps) more for stability, and take a longer time to develop muscular force at a given moment. These factors result in greater stress being placed on the ACL.
Laxity and range of motion. Compared to men, women have a greater range of motion and "looser" knees (knee laxity), hip rotation, and knee hyperextension (how far the knee can be stretched or straightened). The increased hyperextension results in a backward curve of the knee when the leg is straight. This makes it more difficult for the muscles in the back of the thigh (hamstrings) to protect the ACL. Looser knees may also make an ACL injury more likely.
Some studies suggest that the differences in ligament laxity may be due to changing hormone levels. These studies have shown that there is change in ligament laxity during the menstrual cycle and that women are at greater risk for an ACL injury during the ovulatory phase of their cycle than at other times. Other studies have not found a relationship between the menstrual cycle and laxity in the ACL.2 How hormones affect the ACL is not known.
A acetabular labrum tear can cause a wide variety of symptoms. Some people don't have any discomfort. Others have sharp pain around the groin, which may extend into the upper leg or buttocks. Pain can come on suddenly or develop gradually. Rotating your leg may be particularly painful.
Acetabular labral tears often cause a feeling of the leg "catching" or "clicking" in the hip socket as you move it. It may also feel like the leg is locking up.
Over time, the increased stress on the joint could...