Periodization for Maximal Strength
Periodized training likely offers a small advantage over non-periodized training for maximal strength, but the effect is inconsistent and shrinks toward zero when total work is equated.
Those with medical conditions should consult a professional before intensive training.
- Persistent pain or symptoms that do not resolve with rest
- Exertional chest pain, dizziness or breathlessness
What the evidence says
The sources are meta-analyses, randomised trials, narrative reviews and critiques comparing periodized with non-periodized resistance training for maximal strength, and they differ. Favouring periodization: Williams 2017 (meta-analysis) reports greater 1RM improvement with periodized than non-periodized training (ES 0.43, 95% CI 0.27 to 0.58), with greater improvements in untrained individuals; Kraemer 2000 and Kraemer 2003 (randomised trials in collegiate women tennis players) conclude that periodized multiple-set training was “superior” to low-volume single-set or non-periodized training over 9 months; Myers 2015 (meta-analysis) reports a positive effect of periodized training on ball and serve velocity; Vantarakis 2017 reports that an added linear periodized program may induce positive changes in navy cadets; Fleck 1999, Fleck 2011 and Evans 2019 (narrative reviews) report most studies favouring periodized programs for strength. Finding no difference: Buford 2007 and Baker 1994 (randomised trials) report no differences in maximal strength between periodization models when volume and intensity are equated; Heilbronn 2020 reports little difference between periodization models in military personnel; Hoffman 2009 reports gains in the first 7 weeks with no further improvement to week 15 and no clear indication of the most effective program. Questioning the evidence: Afonso 2019 reports that none of the 21 studies in two meta-analyses compared periodized with varied non-periodized programs; Buckner 2020 reports that periodization's claimed advantage lacks experimental support; Ćosić 2019 reports that methodological issues prevent clear conclusions. Favouring non-periodized training: Polito 2021 (meta-analysis, 119 studies in untrained adults) reports higher strength gains with non-periodized than periodized training in both young (ES 1.72 vs. 1.05) and older adults (ES 1.40 vs. 0.74), and concludes that different combinations of training factors improved strength and muscle mass in untrained young and older adults.
- Myth: Periodization is only for advanced lifters. Actually: the meta-analysis behind this block found LARGER effects in untrained individuals, not smaller ones.
- MYTH: Periodization decides how much muscle you build. CORRECTION: it is a claim about maximal strength; what the corpus finds for muscle size is stated separately, on Periodization and Muscle Size.
- Does not diagnose, treat, or cure any disease or injury
- Not a substitute for individualized medical or physical-therapy advice
- Results vary between individuals; no guaranteed outcome
- Agreement
- Direction recorded for 1 of 16 sources; not yet recorded for the rest.
- The claim's outcome
- Outcome not yet recorded
- Certainty
- A source states a certainty rating for 1 outcome.
- Authors
- Sources share authors: S. Fleck (first author of 2 sources); W. Kraemer (first author of 2 sources); S. Fleck (senior author of 3 sources).
- How the sources were read
- Some sources are based on abstracts, not full texts.
What each source measured and concluded (16)
- What it measured
- Muscle strength and muscle mass gains.
- Direction it states for the claim's outcome
- Improved
- How it was read
- read in full text
- What it measured
- Maximal strength (1RM squat, bench press, leg press)
- How it was read
- based on the abstract, not the full text
- What the review says it includes
- Meta-analysis
- Studies and participants, as stated
- 81 effects from 18 studies
- What it measured
- Physical performance abilities (fat-free mass, body fat, power, 1RM strength, serve velocity)
- How it was read
- based on the abstract, not the full text
- What it measured
- Strength (bench press, leg press 1RM), body fat, and circumferences
- How it was read
- based on the abstract, not the full text
- What it measured
- Maximal strength (squat, bench press), power (vertical jump), lean body mass, neural activation (IEMG)
- How it was read
- based on the abstract, not the full text
- What it measured
- Army-specific fitness and skills performance (3RM squat/deadlift/floor press, weight-load marching, fire and movement)
- How it was read
- based on the abstract, not the full text
- What it measured
- Musculoskeletal fitness and navy-specific conditioning (1RM bench/squat, push-ups, abdominal test, 30-m sprint, Navy Obstacle Course)
- How it was read
- based on the abstract, not the full text
- What it measured
- Improvement in strength and power.
- How it measured it
- 1RM squat and bench press (validated), vertical jump (validated), seated MBT (validated).
- How it was read
- read in full text
- What it measured
- Ball/serve velocity.
- How it measured it
- Objective measurement.
- How it was read
- read in full text
- What it measured
- Physiological and performance adaptations (strength and motor performance).
- How it measured it
- Body composition, anaerobic power, VO2(max), strength tests (e.g., 1-RM leg press, bench press, shoulder press), and resting serum hormonal concentrations.
- How it was read
- read in full text
- What it measured
- Whether meta-analyses contrasted periodized programs with constant/varied non-periodized programs and tested timing of adaptations
- How it was read
- screened only, not extracted
- What the review says it includes
- Systematic review of meta-analyses
- Studies and participants, as stated
- 2 meta-analyses (21 studies included within them)
- What it measured
- Theoretical rationale for periodization vs non-periodized progressive overload for hypertrophy and strength
- How it was read
- screened only, not extracted
- What it measured
- Comparison of non-linear (undulating) vs linear periodization for strength and fitness
- How it was read
- screened only, not extracted
- What it measured
- Whether periodization models produce better muscle strength than non-periodized models, appraised via methodological critique
- How it was read
- screened only, not extracted
- What it measured
- Effect of periodized resistance training on skeletal muscle hypertrophy and strength
- How it was read
- screened only, not extracted
- What it measured
- Effects of periodized (traditional strength/power model) vs non-periodized weight training
- How it was read
- screened only, not extracted
Certainty ratings the sources state (1)
- Rating, as the source states it
- high
- Framework
- not named by the source
- Applies to
- Conclusion: "Consistent and high-quality evidence exists that specific resistance training interventions have an effect on velocity."
- Stated by
- Myers et al. (2015)
Each source below is shown with its study design and a link to the original study, or, where it is not a completed research paper, with what kind of record it is; those are not counted. This is the audit trail.
Why do some records show a record type instead of a study design?
A study design is shown for a completed, peer-reviewed paper. A registered protocol, a preprint, a conference abstract, a referee report or a book chapter has not been through peer review as a finished paper, so it is labelled for what it is, and it is counted in no source count. Where a record could not be confirmed as a completed paper at all, it says so rather than guessing. They all stay in the list, and their DOI still resolves, because the count of what was screened is part of the audit trail.
- Protocol / registration A registered plan for a review or trial, not its results.
- Preprint Posted by its authors before peer review.
- Conference abstract A conference summary rather than a peer-reviewed paper.
- Peer-review report A referee's report on a paper, not the paper itself.
- Guideline / position stand A recommendation derived from evidence, which is a step further from the data than the evidence itself.
- Book chapter A chapter in a scholarly book rather than a journal paper.
- Type not recorded Our record does not say what kind of publication this is, so it is counted in no source count. That is a gap in our data, not a judgement about the research.
“Abstract only” means the review read that paper’s abstract, not its full text; “screened only” means it was included at re-screening and not extracted. Both stay in the trail with their DOI, because how a source was read is part of the audit.