The wideout, also known as Chad Ochocinco, one-upped fellow NFL hopeful Robert Gill, who also showed himself doing a 25-mph treadmill sprint in a video that "went viral" but added a degree of difficulty by doing his at a 2.5 percent incline, NBC Sports reported.
Gill, 29, holds a spot on the Arizona Cardinals' 90-man roster and is hoping to make the squad's 53-man squad, but 35-year-old Johnson is currently without an employer following a poor 2011 season with the New England Patriots and a domestic violence arrest last year.
Johnson hauled down 766 passes for 11,059 yards and 67 touchdowns during an 11-year career, including 10 with the Cincinnati Bengals.
Last month he was sentenced to 30 days in jail in Fort Lauderdale, Fla., for violating probation in his domestic violence case, but was released June 17.
2014: The Year in Music [PHOTOS]