The Claim

In trained men, performing 15 to 20 sets per muscle group per week in resistance training results in smaller gains in muscle strength over 12 and 24 weeks compared to performing 5 to 10 sets per muscle group per week for most exercises.

Source: Evidence of a Ceiling Effect for Training Volume in Muscle Hypertrophy and Strength in Trained Men - Less is More?

What the research says

Supports is higher

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

Supports
32score
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

If you're already fit and lift weights, doing way more sets (15–20 per muscle group per week) doesn't make you stronger faster—in fact, you might even gain less strength than if you stick to just 5–10 sets.

See the scientific wording

In trained men, resistance training volumes of 15 to 20 sets per muscle group per week are associated with smaller gains in muscle strength compared to 5 to 10 sets per week for most exercises after 12 and 24 weeks.

What the research says

1 study

  1. Study: Evidence of a Ceiling Effect for Training Volume in Muscle Hypertrophy and Strength in Trained Men - Less is More?

    In trained men, doing 5 to 10 sets of exercises per week made them stronger than doing 15 to 20 sets — more work didn’t help and actually hurt progress.

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.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.