This photograph shows a soldier in the American Air Forces (AAF) seated on top of a table. He is strapped into a machine that measures his breathing and exertion. Peter Karpovich designed the apparatus while he was chief of a physical fitness laboratory for the AAF during World War II. The laboratory was located at the School of Aviation Medicine in Randolph Field, Texas. For more information on Peter V. Karpovich, see: https://springfield.as.atlas-sys.com/agents/people/571
