Final answer:
Knee valgus during a Single-leg Squat Assessment is indicative of overactive adductors and the Tensor Fascia Lata, which may contribute to pathologies like Runner's Knee.
Step-by-step explanation:
When observing knee valgus, or the inward caving of the knees during a Single-leg Squat Assessment, certain muscles can be identified as overactive. Knees caving in can be a sign that the gluteal muscles are not adequately stabilizing the hip and thigh, leading to compensation by the adductor complex and the Tensor Fascia Lata (TFL). Consequently, these overactive muscles exert excessive pull on the knee, causing it to cave inward or display valgus movement. This aberrant movement can contribute to knee pathologies like Runner's Knee, where knee alignment issues result in pain and disability in activities involving the knee. A homeostatic balance between muscles is essential to prevent such overactivity, maintain proper alignment, and reduce injury risk.