In trained men, lifting weights close to failure or stopping short of failure leads to similar increases in muscle thickness, as the differences between these approaches are no larger than the...
Mechanism
Synthesis from 1 study
When trained men lift weights, their muscles respond strongly even if they don’t push all the way to failure — pushing harder doesn’t make them grow more because the signal to build muscle is already maxed out, as shown by similar muscle thickness changes in all groups in 10.47206/ijsc.v5i1.393.
Most probable mechanism
When trained men lift weights, even if they stop short of failure, their muscles already get a strong signal to build more protein — pushing harder to failure doesn’t add much more because the system is already maxed out, as shown by similar muscle thickness changes across all training groups in 10.47206/ijsc.v5i1.393.
Resistance training activates mTORC1 signaling in skeletal muscle, driving muscle protein synthesis rates to near-maximal levels in trained individuals, regardless of proximity to failure, as inferred from consistent hypertrophic outcomes across training intensities in 10.47206/ijsc.v5i1.393.
Muscle protein synthesis rates plateau in trained men after a threshold of mechanical tension and metabolic stress is reached, meaning additional effort toward failure does not further elevate anabolic signaling or net protein balance, consistent with the absence of meaningful differences in muscle thickness changes beyond measurement error in 10.47206/ijsc.v5i1.393.
The observed changes in muscle thickness of the vastus lateralis and pectoralis major fall within the measurement error threshold across all training conditions, indicating no biologically meaningful difference in hypertrophy, regardless of proximity to failure, as reported in 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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