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J3 University is an online education and coaching service made for bodybuilding and physique enhancement. Our podcast interviews experts in the field of research and coaching to bridge the gap between science and in the trench experience. Come and empower yourself to a higher level of physique development.
Episodes
Sunday Mar 15, 2026
Sunday Mar 15, 2026
How often should you actually change your workout split — and is switching too soon killing your progress? In this episode, we break down the real science behind exercise rotation vs. repeatability, including what a 2021 study revealed about regional muscle growth and whether variety actually builds more muscle.
We cover how your experience level should dictate how often you rotate, which muscle groups genuinely need exercise variety and which don’t, and how to structure your upper/lower split so you’re covering full muscle actions without stacking injury risk over time.
If you want more episodes like this — where we translate research into practical coaching decisions — subscribe and follow along each week.
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