Analysis Version
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Analysis v1

Moving your muscles through their full stretch and contraction makes them grow more than only doing part of the movement, especially at the stretched end.

Scientific Claim

Training muscles through a full range of motion or lengthened partials produces greater hypertrophy than training through shortened partials, particularly in distal muscle regions.

Original Statement

“The range of motion category is where we compare a given exercise performed with a different range of motion. This includes a full range of motion, a shortened partial where you move through the part of the range of motion where the muscles are at a shorter length, which for instance would be the top part of a curl, and a lengthened partial where you move through the part of the range of motion where the muscles are at a longer length, which would be the bottom part of a curl.”

From video:We Need to Talk About Jeremy Ethier’s New StudybyHouse of Hypertrophy

Context Details

Domain

exercise

Population

human

Subject

training with full or lengthened range of motion

Action

produces

Target

greater muscle hypertrophy than training with shortened partials

Intervention Details

Type: exercise
Dosage: Full ROM vs. shortened/lengthened partials, multiple sets to failure
Duration: varied across studies (6–12 weeks)

Evidence from Studies

No evidence studies found yet.

Similar Assertions

Even if you don’t move through the full range, doing the exercise where your muscle is stretched the most (like halfway down in a squat) builds more muscle than doing it where the muscle is bunched up (like a shallow squat).

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When comparing full range of motion to lengthened partials, observed hypertrophy differences may be confounded by differences in peak resistance location, making it difficult to isolate the effect of muscle length alone.

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Going all the way up and down doesn’t help you build more muscle than just going halfway down and staying in the stretchy part — the stretch is what matters, not the top part.

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When you stretch your muscles fully during workouts, the ends of the muscles grow more than the middle parts — the stretch makes the muscle ends bulk up more than the center.

0
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Even the middle parts of your muscles grow more when you stretch them fully during workouts — it’s not just the ends that benefit from full range of motion.

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