Nathan Zuntz

German physiologist known as a pioneer of modern altitude physiology and aviation medicine. He published a number of articles on high-altitude medicine, and one of his better known works was Höhenklima und Bergwanderungen in ihrer Wirkung auf den Menschen (High-Altitude Climate and Mountaineering and their Effect on Humans). Zuntz was involved in many facets of physiological research, including metabolism, respiration and nutrition, and is well known for his work in high-altitude physiology. He conducted extensive research on the physiological changes in animals and humans in extreme conditions. Many of his field studies were conducted at Capanna Regina Margherita, a research station at the apex of Monte Rosa, Italy. In 1902 with his assistant Hermann von Schrötter and meteorologists Arthur Berson and Reinhard Süring, he made two high-altitude balloon ascents in which they reached an altitude of 5000 metres. In 1910 Zuntz participated in a scientific expedition to Pico de Teide in the Canary Islands with Schrötter and physiologists Arnold Durig (1872-1961) and Joseph Barcroft (1872-1947). In 1885 with August Julius Geppert (1856-1937), he created the Zuntz-Geppert respiratory apparatus, and for field studies Zuntz invented a portable Gasuhr (dry gas measuring device). In 1889 he constructed an early treadmill (Laufband), and in 1914 added an X-ray apparatus to the machine in order to observe cardiac changes during exercise. In addition, he opened the first laboratory dedicated to sports medicine in Germany (1911). He died on 22 March 1920 in Berlin, aged 72. Link to Wikipedia biography