Exotendon assistive devices have been shown to reduce the rate of energy expenditure during running. Jon Stingel and a team of Mobilize Center researchers at Stanford University wanted to better understand the muscle-level changes that contributed to these cost savings. The team created a musculoskeletal simulation framework that revealed the cost savings came from the quadriceps, hamstrings, and several muscles that control the hip. This framework could be used to study human-device interactions more generally and aid the design process.

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