Human Stress Response and Adaptation in Isolated, Confined, and Extreme (ICE) Environments: A Conceptual and Methodological Pre-Screening Framework

Deep space missions will strain human psychological endurance and resilience. If we want these missions to succeed, we have to know exactly how crews handle severe, long-term confinement. A primary limitation of existing Earth-based simulators is the psychological safety net; participants know they can withdraw and return home if things go wrong, which skews the psychological data. This paper introduces an experimental framework to solve that problem through an intense, pre-screening isolation phase. By placing candidates into highly stressful but controlled environments before they are cleared for long duration isolation, researchers can track immediate shifts in mental stamina, stress thresholds, and team dynamics. What follows is a set of operational guidelines and support strategies designed to prepare astronauts for the raw reality.