016 Training Splits - Why upper/lower, torso/limbs, push/pull, and other split routines face the same problem

In this episode of Hypertrophy: Past and Present, Jake and Chris revisit Joe Weider’s early 1940 full-body program before breaking down the central problem that all split routines face: supraspinal CNS fatigue. Key topics include: • How calcium-ion–related fatigue and inflammation create global CNS fatigue • Why back-to-back training days reduce recruitment, even for unrelated muscles • Why full-body AAA and AB formats avoid these issues