What this means in real training
Why the claim sounds convincing
High-intent rep-range question that connects cleanly to existing guides and calculators.
The mistake is turning a possible mechanism, average association, or useful option into a universal rule.
What the evidence supports
No. Muscle can grow across a wider loading range when sets are sufficiently challenging and the work is recoverable. The relevant evidence needs to match the exact population, intervention, comparison, and real-world outcome instead of borrowing certainty from a mechanism, acute response, or marketing label.
Across comparable effort and volume, how broad is the effective hypertrophy loading range and where do practical tradeoffs appear?
Mechanisms, short-term measurements, and anecdotes can explain interest, but they do not automatically establish long-term benefit or safety.
The useful verdict depends on dose, training status, baseline habits, adherence, and whether the measured outcome matches the promise.
How to use the answer
Use lower, moderate, and higher reps according to the exercise, then progress load or repetitions over time.
Study populations, protocols, outcome definitions, and follow-up periods vary.
Averages do not guarantee the same response for an individual reader.
Pain, illness, pregnancy, medication use, or medical exercise restrictions can change the practical decision.