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About

Neil A. Sharkey is a leading biomechanics researcher whose work has fundamentally reshaped our understanding of foot and ankle function during human locomotion. His primary research areas include the biomechanics of the foot, the role of intrinsic and extrinsic musculature in gait, and the mechanical etiology of common foot pathologies. Sharkey’s most significant contribution is his challenge to the long-held belief that the flexor hallucis longus (FHL) muscle actively shortens during walking. Through a series of highly cited experimental studies—including his 2008 paper “Contribution of the Flexor Hallucis Longus to Loading of the First Metatarsal and First Metatarsophalangeal Joint” (60 citations) and “Evidence of isometric function of the flexor hallucis longus muscle in normal gait” (41 citations)—he provided compelling evidence that the FHL and other extrinsic toe flexors function isometrically, acting as dynamic stabilizers rather than prime movers. This paradigm shift has profound implications for understanding conditions like hallux rigidus and for designing surgical interventions and rehabilitation protocols. His work on segmental motion of the forefoot and hindfoot (8 citations) also offers novel diagnostic tools for clinicians. With a career dedicated to bridging rigorous experimental mechanics with clinical practice, Sharkey’s research continues to influence podiatric medicine, orthopedics, and sports science.