This is a black and white photograph of two men performing a physical exercise. They are standing side-by-side, facing left. The man on the right has his right foot raised and placed on top of a small wooden box. The man on the left has his left leg bent and his foot resting on top of the same box. Both men are wearing light-colored long-sleeved shirts and pants, and shoes. They appear to be engaged in a stretching or strengthening exercise, possibly focusing on the knees or hamstrings. The background is dark and indistinct. Below the image, there is text that reads 'Figur 18. Kniespannung.'