Cam Femoroacetabular Impingement as a Possible Explanation of Recalcitrant Anterior Knee Pain

Figure 5

Kinematic analysis during stair ascending test. (a) Preoperative. (b) Postoperative (7 months of follow-up). Red line, right hip. Blue line, pathologic left hip. Kinetic analysis during stair ascending test. (c) Preoperative. (d) Postoperative (7 months of follow-up). Red line, right hip. Blue line, pathologic left hip. In the -axis you can note the stance phase percentage. Stance phase begins with the heel strike and ends with the toe off.

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