The Iron Sheik had “The Persian Club” challenge where he offered $2000 to all comers if they swung a pair of “75 pound” traditional meels for as many reps as he could.
To my knowledge The Sheik was never beaten, and what’s more, Sheik used the Persian Club Challenge to injure then-champion Bob Backlund before their title match back in ’83 (it wasn’t the first time he used the clubs to get the upper hand against his opponents either, see below.)
He’s a crafty one, that Sheik.
Also of note is the Takhteh Shena (traditional Zurkhaneh pushup board) at his feet. Before his pro-wrestling gig, the Sheik was a bonafide stud on the amateur mat and competed for the Iranian Greco-Roman team in the 1968 Olympics.