Characterization of Joint Resistance and Performance Degradation of the Extravehicular Mobility Unit Spacesuit

Abstract

Introduction: The primary objective of this pilot study was to characterize human performance degradations caused by the pressurized Extravehicular Mobility Unit Spacesuit (EMU). Method: This study assessed maximum strength (force) for elbow flexion/extension and shoulder abduction/adduction for three EMU suit conditions. Results: Statistically significant differences were observed between suit conditions during elbow flexion. Differences of practical significant were observed between suit conditions for mean peak elbow flexion and extension, but not for shoulder abduction/adduction. EMU resistance to movement was found to differ based on the direction of movement. Discussion: Characteristics of the EMU spacesuit may reduce performance for some movements and improve performance for others.