[sedivy94]

Novelty of stimulus is a huge factor, especially as training continues over years. Failure from a set of 20 is very different than failure from a set of 5, and bodybuilders will periodize their training to cycle through the different flavors of stimulus. I think a big contributor might be neuromuscular adaptation. Cycling through those different intensities over training periods measured in months will make this apparent anecdotally.

[solumunus]

> bodybuilders will periodize their training to cycle through the different flavors of stimulus

Some will, many won’t. It’s clearly not necessary.

[machomaster]

They mostly cycle for health (injury prevention) and sanity (not to do the same damn thing).