Many individuals can perform full-range slow concentric and eccentric pull-ups but struggle to achieve muscle-ups or one-arm pull-ups at a high level due to insufficient force generation at the beginning of the movement.

“Um, a lot of people can do a lot of pull-ups and full range slow concentric and eccentric, but that um they rarely ever get to like muscle ups or to one- arm pull-ups at the kind of level that he's pulling a ton of weight.”