For athletes with advanced strength training experience, two different ways of performing resistance exercises—either stopping before fatigue builds up or pushing until fatigue is high—result in the...
Mechanism
Synthesis from 1 study
When you lift weights until you slow down, your body automatically calls on more muscle fibers to keep pushing, no matter how much you slow down. As long as you do the same total amount of work, your nervous system adapts in a way that makes you stronger, even if your muscles don’t grow bigger.
Most probable mechanism
When someone lifts weights until their movement slows down, their muscles have to recruit more muscle fibers to keep pushing, no matter how much they slow down. This recruits more of the strongest fibers, which keeps the nervous system activated and the muscles working hard enough to get stronger, even if they do more or fewer reps as long as the total work is the same.
Resistance training induces neuromuscular fatigue, reducing the speed of movement during repetitions.
Reduced movement speed triggers compensatory recruitment of additional motor units, including high-threshold Type II fibers, to maintain force output.
Increased motor unit recruitment sustains high levels of mechanical tension across muscle fibers, regardless of the velocity-loss threshold used.
Sustained mechanical tension activates intracellular signaling pathways that promote myofibrillar protein synthesis and neural adaptations, leading to increased maximal strength.
Evidence from Studies
Supporting (1)
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Effects of Low- Versus High-Velocity-Loss Thresholds With Similar Training Volume on Maximal Strength and Hypertrophy in Highly Trained Individuals.
Contradicting (0)
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