In trained men, lifting weights close to failure (with 0–6 reps left in reserve) does not lead to consistent differences in how tired or recovered they feel over eight weeks, regardless of how close...
Mechanism
Synthesis from 1 study
When trained men lift weights with different amounts left in the tank — whether they stop early or push to failure — their muscles produce similar levels of chemical fatigue signals as long as the total lifting volume is the same, and their brains use those signals to decide how tired they feel, so...
Most probable mechanism
When people lift weights close to or far from failure, their muscles still produce similar levels of metabolic byproducts and nerve signals over time, and the brain uses these signals to judge how tired they feel — so even if one person stops earlier than another, their body sends roughly the same tiredness signals, as long as the total work done is similar (10.47206/ijsc.v5i1.393).
Metabolic byproducts such as lactate, hydrogen ions, and inorganic phosphate accumulate in muscle tissue during resistance exercise, regardless of proximity to failure, when total work volume is matched (10.47206/ijsc.v5i1.393)
These metabolic signals activate group III and IV afferent nerves in muscle, which transmit fatigue-related information to the central nervous system (10.47206/ijsc.v5i1.393)
The central nervous system integrates these afferent signals with prior experience, motivation, and perceived effort to generate subjective fatigue ratings (sRPE, PRS, MTT), which remain stable across training groups when total work is equated (10.47206/ijsc.v5i1.393)
Evidence from Studies
Supporting (1)
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The Effect of Resistance Training Proximity to Failure on Muscular Adaptations and Longitudinal Fatigue in Trained Men
Contradicting (0)
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