A medical crutch built with a "tensegrity" structure is faster and more stable than traditional rigid designs.
Standard crutches have a trade-off where rigid designs provide stability but send painful shocks into the user's joints. This new design uses a system of compressed struts and tensioned cables to absorb impact while keeping the user balanced. Testing showed that people move faster and with less effort because the crutch returns energy like a spring without the wobbliness of a real spring. It creates a self-tensile module that provides continuous support across uneven ground. This shift means medical mobility aids can finally move beyond the basic wooden or metal pole design used for centuries.
Tensegrity crutches with compliance from a pre-stressed self-tensile module improve ground reaction force profiles, speed, effort, comfort, and perceived stability
arXiv · 2605.02710
Purpose: Six million people use crutches as mobile aids in the US. Rigid designs with no axial mobility limit sensory feedback and lead to secondary injury on the upper joints. Spring-loaded designs offer compliance but may compromise stability. We designed a biologically inspired tensegrity crutch with a compliant module aiming to achieve favorable mechanical properties. The terminal module was a pre-stressed self-tensile two-cell tensegrity structure. We compared the tensegrity crutch to comme