Chin ups - Medium grip

In 2000 (and on a few other occasions) I published and claimed copyright on this exercise description (bolding added now):

Medium Grip Chins :

Warm up on the lat pulldown. Grip the bar with a pronated palms down grip, about shoulder width. Allow the body to hang prior to take off with feet off ground, no body sway. Bend the knees and tuck them up behind, crossing the legs at the ankles. Pull the chin over the bar. Control the lowering to avoid any body sway. Stretch and pause in the bottom position.

I was conducting research and I came upon the following exercise in a publication copyright claimed by another 'author' at a subsequent date (bolding added):

Medium Grip Chins :

Warm up on the lat pulldown. Grip the bar with a pronated palms down grip, about shoulder width. Allow the body to hang prior to take off with feet off ground, no body sway. Bend the knees and tuck them up behind, crossing the legs at the ankles. Pull the chin over the bar. Control the lowering to avoid any body sway. Stretch and pause in the bottom position.

And I said to myself: “That looks familiar!” So I cross-referenced it and I said to myself: “Wow! No wonder that looked familiar!”

I noted that the use of this description was in the absence of credits or references to the origin or permission to use from the original author (myself), and that the 'author' claimed copyright....