A new study conducted in one of Earth's most extreme environments has revealed a surprising insight into human behavior: spending more time physically close to teammates does not necessarily improve teamwork. Instead, prolonged isolation and constant proximity may increase conflict, mistrust, loneliness, and perceived declines in performance.
The findings come from a 10-month observational study of 12 crew members stationed at Concordia Research Station in Antarctica. The research was published on May 25, 2026, in the peer-reviewed journal Proceedings of the National Academy of Sciences (PNAS) under the title Social Interactions in Isolated, Confined, and Extreme Environments: A Study of Antarctic Winter Teams Using Wearable Sensors.
An international research team led by Jan Schmutz and Andrea Cantisani examined how prolonged isolation and confinement influence team dynamics during a ten-month overwintering mission at Antarctica's Concordia Station. Schmutz is affiliated with the Department of Psychology at University of Zurich, while Cantisani is a psychiatrist and researcher at University of Bern. Their study used the remote Antarctic research base as a real-world analogue for future long-duration space missions due to its extreme environmental conditions and isolation.
The findings offer important lessons not only for future missions to the Moon and Mars but also for healthcare teams, military personnel, researchers, and professionals working in high-stress or remote settings.
Concordia Research Station is one of the most isolated inhabited locations on Earth. Situated more than 3,000 meters above sea level on the Antarctic plateau, the station experiences months of darkness, temperatures that can fall below minus 80°C, and complete isolation during the winter season.
Scientists frequently use Concordia as an analogue for long-duration space missions because crew members live in confinement with limited social contact and virtually no possibility of evacuation during winter months.
Researchers monitored the crew throughout their overwintering mission to better understand how prolonged isolation affects group behavior and interpersonal relationships.
To track social interactions, the research team combined traditional psychological questionnaires with wearable electronic sensors that continuously measured how often participants spent time near one another.
The results challenged a widely held assumption about teamwork.
Despite frequent interaction, crew members who spent more time in close physical proximity did not develop stronger relationships or greater team cohesion. Instead, researchers found that increased proximity often coincided with higher levels of conflict and lower perceptions of team effectiveness.
The findings suggest that constant exposure to the same small group of individuals may create interpersonal strain rather than strengthen collaboration.
As the mission progressed, participants reported notable psychological and social changes.
Researchers observed increases in:
Loneliness
Interpersonal conflict
Mistrust
Paranoid thoughts
Social withdrawal
At the same time, crew members reported declining levels of:
Team cohesion
Group unity
Perceived team performance
The study suggests that long-term confinement affects both individual well-being and collective functioning, highlighting the complex social challenges associated with extreme environments.
Researchers also observed a tendency for crew members to form smaller social groups based on shared nationality.
Over time, French participants increasingly spent time with other French crew members, while Italian participants gravitated toward fellow Italians. This pattern became more pronounced as the isolation period continued.
The researchers noted that subgroup formation may contribute to social fragmentation, potentially increasing tensions and reducing overall team cohesion in confined environments.
Although the study focused on an Antarctic expedition, its findings extend far beyond space exploration.
Healthcare professionals, military personnel, scientific researchers, offshore workers, and employees operating in remote or high-pressure environments often face similar challenges associated with prolonged interaction within small groups.
The research suggests that effective team management should balance collaboration with opportunities for personal space and social flexibility. Simply increasing interaction may not improve performance if individuals lack opportunities to disengage and recharge.
For healthcare systems in particular, where teamwork remains essential to patient care, understanding how prolonged stress and close working relationships influence trust and cooperation could help organizations build healthier and more resilient teams.
The Concordia study highlights an important reality of human behavior: connection alone does not guarantee cohesion.
(Rh/ARC)
