The three-sided nail, designed by the Norwegian-born American Marius Smith Petersen (1886-1953), Professor of Orthopedic Surgery at Harvard University, was a major advance in the treatment of fractures of the femoral neck.
Titled 'Science is striving to determine the secrets of Veteran's Performance', an American magazine referred to the physical research of American long-distance runner Clarence DeMar (1888-1958), who won the bronze medal in the marathon at the 1924 Olympics in Paris and who now prepared for his fourth Olympic participation. The investigation was done with field tests, but the problem was that the physician had to walk with the athlete.
British cardiologist Paul Wood (1907-1962) (photo) and American cardiologist Charles C. Wolferth (1887-1965) described changes in the ST-segment during practice and refered to the usefulness of exercise in diagnosis, but also claimed it was dangerous to have patients with coronary issues exercise. They claimed that the precordial derivation (4) was more useful in determining ischemic events than the standard leads.