The Claim

In highly trained individuals, resistance training with a high-velocity-loss threshold (40% for squat, 60% for bench press) results in a 6% greater increase in vastus lateralis muscle thickness after six weeks compared to training with a low-velocity-loss threshold, while maximal strength gains are equivalent between the two thresholds.

Source: Effects of Low- Versus High-Velocity-Loss Thresholds With Similar Training Volume on Maximal Strength and Hypertrophy in Highly Trained Individuals.

What the research says

Supports is higher

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

Supports
60score
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

Among highly trained individuals, using higher velocity loss during resistance training leads to a 6% greater increase in thigh muscle thickness after six weeks compared to lower velocity loss, while strength gains are the same regardless of the threshold used.

See the scientific wording

In highly trained individuals, high-velocity-loss thresholds (40% for squat, 60% for bench press) may lead to a small but statistically significant increase in vastus lateralis muscle thickness (6% greater than low-velocity-loss) after six weeks of resistance training with similar total volume, while maximal strength gains remain equivalent between thresholds.

Why this might work

When lifting with a higher speed loss limit, muscles fatigue faster, causing more waste products to build up and forcing the body to recruit more muscle fibers. This combination of chemical stress and greater fiber activation triggers stronger signals for muscle growth, leading to thicker muscle fibers without changing overall strength.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Effects of Low- Versus High-Velocity-Loss Thresholds With Similar Training Volume on Maximal Strength and Hypertrophy in Highly Trained Individuals.

    For people who already lift weights regularly, stopping their sets when the bar slows down a lot (40-60% speed loss) made their thigh muscles grow a little more than stopping when it only slowed a little (20-30% speed loss)—but both ways made them just as strong.

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

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