When trained men estimate how many more reps they could have done during weightlifting, their self-reports often don't match the actual effort measured by barbell speed, suggesting that relying on...
Mechanism
Synthesis from 1 study
When people lift weights until they feel close to failure, their nerves send signals to the brain about how tired the muscles are — but when muscles are fatigued, those signals get mixed up, making people think they have more reps left than they do, or less, as shown in 10.47206/ijsc.v5i1.393.
Most probable mechanism
When people lift weights, their brain relies on how their muscles feel to guess how close they are to failure — but when muscles are tired or under load, the signals from nerves in the muscles and joints get distorted, making them think they have more reps left than they actually do, or vice versa, as shown in 10.47206/ijsc.v5i1.393
Fatigue-induced changes in muscle metabolite accumulation and afferent nerve firing alter proprioceptive feedback from muscle spindles and group III/IV afferents during resistance exercise, distorting the perception of effort and proximity to failure as observed in 10.47206/ijsc.v5i1.393
Altered afferent signaling reduces the accuracy of central nervous system integration of sensory input, leading to mismatched self-reported RIR estimates compared to objective barbell velocity metrics as demonstrated in 10.47206/ijsc.v5i1.393
Evidence from Studies
Supporting (1)
Community contributions welcome
The Effect of Resistance Training Proximity to Failure on Muscular Adaptations and Longitudinal Fatigue in Trained Men
Contradicting (0)
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