Training & movement
B · Reasonable confidenceDoes each training load produce its own effect on your muscles?
Subject: Loading Recommendations for Muscle Strength, Hypertrophy, and Local Endurance: A Re-Examination of the Repetition Continuum
What this means
Current research only partly supports the idea that each load produces its own training effect. The authors propose that muscles adapt across a wide range of loads.
Schoenfeld BJ, Grgic J, Van Every DW, Plotkin DL · 2021 · Sports (Basel)
What does this rating mean?
A solid systematic review with caveats, or consistent indications with a limited scope.
Findings
The repetition continuum is not well supported for hypertrophy — adaptations can be obtained across a wide spectrum of loading zones when effort is sufficient. Heavy loads remain superior for maximal strength; the traditional 8-12 rep 'hypertrophy zone' is not uniquely optimal.
Who this applies to
Broad range of RT populations including untrained, trained, older adults, women
What to keep in mind
This is a narrative review presenting the authors' view. The abstract gives no numbers of studies or participants.
Practical conclusion for REZA
Supports why REZA doesn't rigidly stick to a fixed 8-12 rep 'hypertrophy zone' — a wide range of loads works, as long as effort is sufficient.
View method and source
Methodology
Evidence overview
Intervention
N/A (narrative review of evidence)
Outcome measures
Muscle strength, hypertrophy, local muscular endurance
Limitations
Narrative review, not systematic; no new data analyzed; relies on interpretation of existing literature.
Original source
DOI: 10.3390/sports9020032 · PMID: 33671664
View on PubMed →This information is general education about scientific research. It is not personal medical advice and does not replace diagnosis or treatment by a doctor or other healthcare professional. If you have symptoms, a medical condition or take medication, consult your GP or treating professional before changing your training or nutrition.