The Claim

Do muscles grow evenly during leg extensions?

Source: Drop-Set Training Elicits Differential Increases in Non-Uniform Hypertrophy of the Quadriceps in Leg Extension Exercise

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
54score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

Muscles don’t grow evenly — some parts get bigger than others, and different muscles in the thigh respond differently to the same exercise.

See the scientific wording

Quadriceps hypertrophy in response to leg extension training occurs in a non-uniform manner, with regional differences in growth observed between the rectus femoris and vastus lateralis, and within segments of the rectus femoris (proximal > mid > distal), highlighting the importance of site-specific measurement.

What the research says

1 study

  1. Study: Drop-Set Training Elicits Differential Increases in Non-Uniform Hypertrophy of the Quadriceps in Leg Extension Exercise

    The study found that when people do leg extensions, their front thigh muscle grows more at the top and middle than at the bottom, and the side muscle doesn’t grow much at all—exactly what the claim says.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

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