The ONE Exercise to Correct Flat Feet

Berg’s core argument is that flat feet represent a dysfunctional movement strategy where the body over-relies on the quadriceps and hip flexors because the arch cannot store and release energy. Sprinting, by its nature, forces the posterior chain to engage with maximum power, essentially ‘rewiring’ the body to use the glutes and hamstrings as primary movers. He recommends a cautious entry: begin with skipping and dynamic drills to prepare the nervous system, then execute submaximal sprints of short duration. He claims this protocol not only restores the arch but also alleviates lower back pain and improves posture by rebalancing muscle recruitment. The expected 6–8 week timeline offers a concrete goal for users.

Berg structures the progression from low-intensity drills to sprinting to safely transition the body from a collapsed-arch movement pattern to a spring-driven one. A and B skips are staples in track warm-ups for good reason: they isolate components of the sprint stride. Berg adds high knees and butt kicks as further primers. This sequence is essential for those with flat feet because their glutes and hamstrings are typically under-recruited; the drills begin waking up those muscles before the more demanding sprints. By rejecting static stretching—which ‘turns off muscles’—he aligns with modern athletic warm-up recommendations.

Berg argues that the foot arch functions as a preloaded spring that provides free energy during walking. When the arch collapses—a 'fallen arch'—the body compensates by overusing quadriceps and hip flexors, while the glutes and hamstrings weaken and atrophy. Sprinting uniquely activates the posterior chain with maximum power, 'putting back that spring' and rewiring movement patterns. He claims that even older individuals with flat feet can regain their arch and reduce back pain through a structured sprint protocol, directly contradicting the narrative that flat feet are a permanent mechanical failure. By framing sprinting as the corrective exercise, Berg shifts the paradigm from passive support to dynamic rehabilitation, emphasizing that the whole body—not just the foot—must be re-educated.

Berg explains that all infants have flat feet and only develop a normal arch between ages 6 and 10 through natural movement that exercises intrinsic foot muscles. If those muscles aren’t used sufficiently—due to excessive shoe-wearing or lack of barefoot play—the arch may never form or can collapse later in life. This frames flat feet as a behavioral and neuromuscular issue rather than a fixed genetic trait, opening the door for corrective exercise. It also implies that the critical window for prevention is childhood, but reversal is still possible in adulthood through targeted activity.

Berg connects flat feet to a broader pattern of connective tissue weakness driven by missing fat-soluble activators and magnesium. He likens it to rickets, where soft bones can be pulled out of shape by muscles; similarly, weak collagen may allow the arch to collapse. He also points to dental crowding requiring braces and scoliosis as other manifestations of the same deficiency pattern. This perspective suggests that even if children do exercises, if the raw material—collagen—is compromised, arches may still fail to develop optimally. He implies that later plantar fasciitis may also trace back to this early vulnerability.