Microgravity Tightens Astronaut Grip

A new study shows astronauts systematically increase grip force in zero gravity—overcompensating as if objects might float away—and then slowly re‑learn Earth‑normal sensorimotor mappings after return. The behaviour appears driven by risk‑avoidance and shows rapid, task‑specific neural adaptation to an environment without weight. — This finding affects mission safety, tool and interface design, rehabilitation protocols for returning crew, and broader planning for long‑duration and commercial spaceflight.