In 1956-57 RKO made a bunch of sports-related short films, then went out of business. They stayed unviewed until 1994 when they were acquired by TCM, where they’re being shown occasionally. This is one, and it’s about kayaking, on “cold and unruly” water.
The kayaks being used in the film showing the sport in Austria are made from wooden frames with rubber skins on them, with “less strength than a dancing shoe”. People also do crazy shit like this: