• exosuits
• human performance augmentation
• physically assistive devices.
• wearable robots

Over the past decade, considerable steps have been made in designing wearable assistive devices that reduce the metabolic cost of walking. As the field continues to advance, a growing emphasis is extending to human running, driven by the goal of improving efficiency and reducing metabolic strain. The aim of this study it to develop a portable active exosuit to support hip extension during endurance running. The exosuit, featuring custom linear actuators and a control system synchronous with the wearer’s kinematics, initially underwent bench testing and, finally, a field evaluation with users running at their self-selected pace on an athletics track. Results from seven participants showed a significant reduction in the metabolic cost of transport when the exosuit was active. Specifically, a 9.6% decrease was observed with respect to the unpowered condition, with a 4.3% net saving compared to not wearing the device. Additionally, kinematic assessments revealed no alteration of the participants’ motion after toe-off, indicating transparency to physiological movement pattern during hip flexion. These findings highlight the potential of the exosuit to enhance athletic performance, opening new possibilities for running assistance in real-world scenarios.