Dr. Eric Helms is a leading strength and hypertrophy expert. We spoke in depth about periodization for bodybuilders:

Units of time in the training year
DUP (daily undulating periodization)
Mesocycle progression
Progression across mesocycles: volume, frequency, rep ranges, exercise selection
Metabolite blocks
Length of massing phases
Optimal body fat percentage for muscle growth
Rates of gain
Resensitization phases
Frequency of fat loss phases
Where he’s at in his season

Find Dr. Helms at:
https://3dmusclejourney.com/
IG: @helms3dmj
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About me: I'm a medical doctor and natural men’s physique athlete based in Vancouver, Canada. I seek to share science-based perspectives to help people lose fat and gain muscle. These will reflect the current expert consensus in the scientific bodybuilding community. I‘m lifetime drug-free and have been training since 2012.
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Disclaimers: Consider seeing a physician to assess your readiness before beginning any fitness program. Information presented here is to be applied intelligently in the individual context. I do not assume liability for any loss incurred by using information in this podcast.