One other thing that Thibaudeau said in the first video about that myofibril protein synthesis (MPS) driving hypertrophy. He said that naturals had to work out more frequently than enhanced trainers to maintain MPS. However, there was a study conducted a couple of years ago on the effects of equal-volume resistance training with different training frequencies (once or twice a week) in muscle size and strength in trained men:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6016534/
The findings were not consistent with Thibaudeau's premise.
Although the study made a case for working each muscle group only one a week, and I have experimented with this frequency for some time in the past, I presently favor twice a week since I have whittled my workouts to bite-size sessions of only ~20 minutes each. The workouts are wall-to-wall intensity, but they're over soon after they've begun. So, for better or worse, I find myself somewhere between Thibaudeau's theory and the study's findings.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6016534/
The findings were not consistent with Thibaudeau's premise.
Although the study made a case for working each muscle group only one a week, and I have experimented with this frequency for some time in the past, I presently favor twice a week since I have whittled my workouts to bite-size sessions of only ~20 minutes each. The workouts are wall-to-wall intensity, but they're over soon after they've begun. So, for better or worse, I find myself somewhere between Thibaudeau's theory and the study's findings.