In this episode of Hypertrophy: Past and Present, Jake and Chris discuss Sig Klein’s extensive routine and use it as a springboard to tackle one of the biggest programming questions: how much exercise variety do you really need for maximal growth?

Key topics include:

• How neuromechanical matching explains which motor units get recruited first
• Voluntary activation deficits - why bigger muscles and bigger lifts mean some motor units aren't recruited
• How to use unilateral work to meaningfully increase recruitment
• Why some muscles require greater exercise variation than others