Did Ben Johnson ever perform, Plyometrics during his career or did he just rely on heavy weight training?
yes he did and Charlie’s material explains how to apply them.
I think it would be important to clarify the term plyometrics and its actual use with Ben as he did have a knee condition that prevented the implementation of true plyometrics ( if i remtmber correctly from CFTS).
Depending on one’s definition of plyos you could say he did or didnt.
I do not believe he used depth jumps with him, but much of the training was inherently ‘plyometric’ aside from the obvious speed work, he performed md ball throws and jumps and skipping drills. additionally, towards the later portion of his career the majority of the work was speed and weights. Charlie talks about basing progressions of jumps and plyos in in the GPP video and much more more if you wich for more info.