Training plans can look more impressive as their charts become more complex. But complexity is not the same as an established muscle-growth advantage. Two common ways of varying training were compared in a meta-analysis without a clear winner for hypertrophy.

What the research found

A meta-analysis of thirteen studies compared linear and daily undulating periodisation for muscle growth. It did not find a clear hypertrophy difference between the two approaches. Evidence in well-trained participants was limited. [1]

This result concerns muscle growth, not every strength or sporting outcome. It also does not compare planned training with doing random workouts.

Choose a structure you understand

Use a plan whose progression you can follow and whose sessions fit your schedule. A more elaborate structure may suit some goals, but it should have a purpose you can explain. Do not assume that a confusing calendar is evidence of a better muscle-building programme.

Putting it into perspective

A simple progression may be easier to explain and follow, while a varied schedule may make the week more engaging for another person. The review leaves room for that practical choice. It does not support paying for complexity solely because an elaborate plan appears more scientific on paper.