Foot pronation (flat feet) with adducted, internally rotated knees (knock knees) describes which syndrome?

• A. Pronation distortion syndrome
• B. Lower crossed syndrome
• C. Upper crossed syndrome
• D. Repetitive lack of motion

Answer: (A)

Overpronation of the foot sets off an alignment ripple up the leg. When the arch collapses and the heel everts, the tibia tends to rotate inward. That internal rotation of the lower leg pushes the knee toward the midline, so it adducts and rotates internally—what you observe as knock knees. This pattern of a pronated foot with inward-rotated knees is the hallmark of Pronation Distortion Syndrome. It reflects a setup where excessive foot pronation and medial collapse create a chain reaction that alters knee alignment and common surrounding muscle imbalances, such as tight calves and adductors along with relatively weak stabilizers higher up the leg and hip.

Lower Cross syndrome involves a different pelvic and spine pattern with tight hip flexors and lumbar extensors and weak glutes/abs in the midsection. Upper Cross syndrome centers on shoulder and neck posture with tight chest and upper back muscles and weak rear deltoids and deep neck flexors. Repetitive lack of motion isn’t the pattern described here.