The Claim

A one-week complete cessation of resistance training at the midpoint of a 9-week high-volume program reduces lower body isometric and dynamic strength gains in young, resistance-trained adults compared to continuous training, with posterior probabilities of 0.924 and 0.851 favoring continuous training, respectively.

Source: Gaining more from doing less? The effects of a one-week deload period during supervised resistance training on muscular adaptations

What the research says

Supports is higher

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

Supports
84score
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

In young adults who regularly lift weights, stopping all resistance training for one week halfway through a 9-week program results in smaller increases in lower body strength compared to those who train continuously.

See the scientific wording

A one-week complete cessation of resistance training at the midpoint of a 9-week high-volume program reduces lower body isometric and dynamic strength gains in young, resistance-trained adults compared to continuous training, with posterior probabilities of 0.924 and 0.851 favoring continuous training, respectively, suggesting a small but probable negative effect on strength adaptation.

Why this might work

When training stops, muscle cells stop receiving the signal to build more contractile proteins, so muscle fibers lose their ability to generate force as quickly as they would if training continued.

Supported mechanismbased on 1 study

What the research says

1 study
  1. Study: Gaining more from doing less? The effects of a one-week deload period during supervised resistance training on muscular adaptations

    Taking a one-week break from leg workouts halfway through a nine-week training program led to slightly smaller gains in leg strength compared to training without stopping, according to this study.

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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