During a weight-bearing assessment for supple Pes Planus, what is likely to happen to the medial longitudinal arch?

In a weight-bearing assessment for supple Pes Planus, the medial longitudinal arch is expected to flatten and might appear to collapse. This is a characteristic feature of supple Pes Planus, which is a flexible flatfoot condition. When weight is applied, the soft tissue structures, such as ligaments and tendons, in the foot can stretch and cause the arch to drop lower than its non-weight-bearing position, giving the appearance of a flattened arch. This flattening occurs because the foot is unable to maintain its normal arch shape under the load, reflecting the characteristic adaptability and the tendency for the arch to lose its definition in weight-bearing situations. Understanding this aspect of foot mechanics is crucial for athletic trainers when evaluating foot function and designing appropriate treatment or intervention strategies.