The Claim

Repetitions-in-reserve prediction accuracy demonstrates statistical equivalence between 1-RIR and 3-RIR predictions, between first and second sets, and between first and second testing sessions during bench press exercise in resistance-trained individuals.

Source: Accuracy of Intraset Repetitions-in-Reserve Predictions During the Bench Press Exercise in Resistance-Trained Male and Female Subjects

What the research says

Supports is higher

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

Supports
21score
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.

Quantitative
1 study reviewed
In plain English

When trained lifters guess how many more reps they could do during bench press, their guesses are equally accurate whether they're guessing 1 rep left or 3 reps left, and this stays the same across different sets and sessions.

See the scientific wording

Repetitions-in-reserve (RIR) prediction accuracy shows statistical equivalence between 1-RIR and 3-RIR predictions, between first and second sets, and between first and second testing sessions during bench press exercise in resistance-trained individuals.

What the research says

1 study
  1. Study: Accuracy of Intraset Repetitions-in-Reserve Predictions During the Bench Press Exercise in Resistance-Trained Male and Female Subjects

    The study looked at whether people can accurately guess how many more reps they could do during bench press, and found that guesses for 1 rep left and 3 reps left were equally accurate, just like the claim says.

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

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