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About

John E. A. Bertram is a leading figure in the biomechanics of legged locomotion, with a particular focus on the fundamental principles that govern efficient movement. His research spans from the mechanics of brachiation in gibbons to the energetics of human walking, seeking to separate the core goals of locomotion from the specific mechanisms that achieve them. Bertram’s seminal 2004 review on brachiation mechanics (55 citations) remains a cornerstone for understanding how Hylobatid apes move through trees, while his later work on walking—such as the energy-optimal timing of push-off and swing-leg retraction (13 citations)—has advanced our grasp of human gait economy. His 2017 paper on the fundamental task of locomotion (16 citations) and his 2018 exploration of minimally actuated walking (12 citations) challenge conventional engineering approaches, identifying core challenges and novel solutions for economical legged movement. Most recently, his 2025 study on gait synchronization with machine oscillators (3 citations) opens new avenues for human-robot interaction. Bertram’s work consistently bridges biology and robotics, offering deep insights into how organisms move efficiently and how these principles can inspire better robotic designs.