Watch and learn the favorite exercise routine of early 20th century Europeans.
See the rest of Slate's Fitness Issue.
Correction, Jan. 21, 2011:This piece originally indicated that J.P. Müller proscribed 15 minutes of exercise per day. Müller in fact prescribed that amount of exercise. (Return to the corrected sentence.)
Sarah Wildman is a visiting fellow at the International Reporting Project at Johns Hopkins School of Advanced International Studies.