Statistics from Altmetric.com
Exercise testing is seldom seen on postage stamps. The 2 centavos stamp from Cuba was released in 1971 as part of a set of seven celebrating the 10th anniversary of the first manned space flight, and shows cardiopulmonary exercise testing. A similar stamp was issued by Russia in 1980 to mark the 20th anniversary of the Gagarin Cosmonaut Training Centre. The bicycle ergometer stamp was the highest value in a set of three.