The Claim
In untrained individuals performing biceps curls and triceps pushdowns over an eight-week period, the use of external momentum results in a 70.9% greater volume load compared to strict form, despite similar hypertrophic outcomes.
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.
Untrained people who use momentum while doing biceps curls and triceps pushdowns can lift more total weight over eight weeks than those who use strict form, but both methods lead to similar muscle growth.
See the scientific wording
When performing biceps curls and triceps pushdowns with external momentum, untrained individuals achieve approximately 70.9% greater volume load than with strict form over eight weeks, indicating that momentum allows for higher total mechanical work despite similar hypertrophic outcomes.
When people swing weights during arm exercises, they can lift heavier loads more times because the motion uses momentum to carry the weight through parts of the movement where muscles would normally struggle. This lets them do more total work, but the muscles don’t grow any bigger because the actual tension on the muscle fibers during the hardest parts of each rep stays similar to when lifting slowly and strictly.
What the research says
1 studyPeople who swing weights a little while doing arm curls and pushdowns can lift more total weight over time than those who move slowly and strictly—but both groups end up with about the same size muscles.
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.