The Claim
The current evidence regarding the effects of range of motion on upper-body muscle hypertrophy is conflicting and insufficient to draw definitive conclusions, as one study reported greater hypertrophy with partial range of motion in the triceps and another showed a non-significant trend toward greater hypertrophy with full range of motion in the biceps, with no consensus established on the optimal range of motion for upper-body resistance training.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Some studies say doing arm exercises with shorter movements builds more muscle in the triceps, while others think full movements might help the biceps more—but we just don’t know for sure what’s best yet.
See the scientific wording
Evidence on the effects of range of motion on upper-body muscle hypertrophy is conflicting and insufficient to draw definitive conclusions, as one study found greater growth with partial ROM (triceps) and another showed a non-significant trend favoring full ROM (biceps), with no consensus on optimal ROM for upper-body training.
What the research says
1 studyThis study looked at whether doing exercises with a full or partial arm movement helps muscles grow bigger, and found that the results are mixed and not clear enough to say which is better — just like the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.