Periodization has been the cornerstone of strength and conditioning for decades. Yet despite its widespread acceptance, you’ll occasionally come across headlines suggesting that periodization may not be superior to other training methods.

A thought-provoking review published in Sports Medicine argues that these conclusions may stem from a fundamental problem: many studies claiming to investigate periodization aren’t actually studying periodization at all.

Programming Is Not Periodization

One of the biggest misconceptions in the research is the tendency to use the terms “programming” and “periodization” interchangeably.

They’re not the same thing.

Programming refers to the design of individual workouts and training blocks. It includes variables such as exercise selection, sets, reps, loading, rest intervals, tempo, and training frequency.

Periodization, on the other hand, is the long-term strategic organization of training. It determines how those programming variables are manipulated over months or even years to maximize performance, manage fatigue, and ensure an athlete peaks at the appropriate time.

In other words, programming is what you do today. Periodization is how today’s workout fits into the bigger picture.

The Problem with Many Research Studies

The review points out three major issues with the current literature.

First, true periodization is intended to organize training over extended periods, often spanning an entire competitive season or annual plan. Yet many studies last only six to twelve weeks, making it difficult to evaluate the long-term effects of periodized training.

Second, many studies compare two different resistance training programs and label them as different “periodization models.” In reality, they are simply comparing different programming strategies over a relatively short time frame.

Finally, most research is conducted on recreational lifters performing only resistance training. Competitive athletes must also balance sport practice, conditioning, competitions, travel, recovery, and other stressors. Effective periodization integrates all of these demands, not just what happens in the weight room.

What This Means for Coaches

The review doesn’t argue that periodization is ineffective. Rather, it suggests that many studies are asking the wrong question.

If researchers aren’t evaluating long-term training plans that integrate multiple training stressors, they cannot draw strong conclusions about the effectiveness of periodization itself.

For coaches and personal trainers, this reinforces the importance of thinking beyond individual workouts. A well-designed training session is valuable, but long-term success depends on how those sessions are organized into phases that systematically develop strength, muscle, power, endurance, and recovery over time.

Practical Take-Home Message

Changing exercises, sets, or repetition schemes from week to week doesn’t automatically mean you’re periodizing a program.

True periodization involves strategically planning the progression of training over months or years, coordinating workload with recovery, and preparing the individual to perform at their highest level when it matters most.

The next time you see a headline claiming that “periodization doesn’t work,” take a closer look at the study. Chances are it evaluated short-term programming—not true periodization.

Reference

Kataoka R, Vasenina E, Loenneke JP, Buckner SL. Periodization: Variation in the Definition and Discrepancies in Study Design. Sports Medicine. 2021;51(4):625-651.