Pes planus, commonly known as flat feet, describes a condition where the arch of the foot collapses, resulting in the entire sole coming into complete or near-complete contact with the ground. Historically, and to a lesser extent currently, this condition has presented concerns regarding an individual’s suitability for military service. The degree of flatness can vary significantly, with some individuals experiencing no pain or functional limitations, while others may suffer from pain, instability, and difficulty wearing standard footwear.
The perceived importance of arch support for military personnel stems from the physically demanding nature of service. Activities such as marching, running, carrying heavy loads, and prolonged standing place significant stress on the feet and lower limbs. It was believed that individuals with flat feet were more susceptible to injuries like stress fractures, plantar fasciitis, and knee pain, potentially impacting their ability to perform required duties. This rationale influenced recruitment policies for many years, leading to the disqualification of individuals with pronounced flat feet. However, the understanding of this condition has evolved, with advances in podiatric medicine and orthotics.