Human Performance, Spacesuit Dynamics, and EVA System Design Welcome to Astralis Consulting . This article is part of our ongoing series examining human–machine interaction in space missions , with a particular focus on how human performance, physiology, cognition, and engineering systems intersect during the most demanding operational scenarios in spaceflight. Extravehicular activity, or EVA, represents a unique convergence of systems engineering, biomechanics, and space med