Walter Camp developed a set of exercises for the military during World War I. One of them was called "the wing." GIs nicknamed it the "jumping jack" after the kids' toy - well before anybody heard of Jack LaLane.
There's a lot of misinformation on Google. Anything anybody puts on line ends up there, including what people post here. And DJs are not much better sources of information than gym teachers.
There's a lot of misinformation on Google. Anything anybody puts on line ends up there, including what people post here. And DJs are not much better sources of information than gym teachers.