Another important aspect of high-altitude flight involved physiological problems that balloonists could experience when exposed to conditions at great heights. Here, Berson assisted physiologists Hermann von Schrötter and Nathan Zuntz with pioneer experiments in the field of aviation medicine. He undertook high-altitude balloon ascents with the two physiologists, and conducted studies of decompression sickness with a pneumatic chamber located at the Jüdischen Krankenhaus (Jewish Hospital) in Berlin.