John Kearns Tett, DFC & (1916 – 1974) was a Canadian athlete, wartime military pilot, physical fitness educator, and public servant.
In the 1950s, he fathered the 5BX (Five Basic Exercises) fitness program developed for the Royal Canadian Air Force (RCAF).
According to the official Mentioned in Despatches "During the subsequent thirteen hours in which the crew drifted in the dinghy, Pilot Officer Tett offered a source of encouragement to all."
In 1956 he hired researcher Bill Orban and directed him to devise a program which emphasized the developments of a high level of fitness, but would consume only a relatively small amount of the RCAF personnel's time.
In 1971, he urged the city to purchase a former brewery and distillery built by James Morton (Canadian businessman) in the 1820s, a lakeside site which he envisioned as a community arts complex.