The Claim
The between-individual variation in prediction accuracy during resistance exercise has a standard deviation of 1.45 repetitions, indicating that individual differences in prediction accuracy are not extreme despite consistent group-level underprediction.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
When predicting how many repetitions a person can perform during resistance exercise, the differences between individuals are small, with a standard deviation of 1.45 repetitions, meaning predictions are consistently too low at the group level but vary little between people.
See the scientific wording
The between-individual variation in prediction accuracy during resistance exercise is relatively small, with a standard deviation of 1.45 repetitions, suggesting that while group-level underprediction is consistent, individual differences are not extreme.
When people lift weights, their brain continuously receives signals from muscles and joints about how hard the effort feels. These signals are very similar across individuals, so everyone’s brain estimates how many more reps they can do in nearly the same way, even though their actual strength differs.
What the research says
1 studyPeople tend to guess they can do fewer reps than they actually can, but the study found that how wrong each person is doesn’t vary much — most people are off by about the same amount, within roughly 1.5 reps.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.