“Theoretically training to failure is important to ensure complete stimulation of the motor unit pool in the target muscle, as well as to optimize stimulation of the spectrum of fibers,” say Brad Schoenfeld, author of the Max Muscle Plan
. Therefore, stopping your sets short or just going through the motions will reduce the training effect you’re after and stall your progress. “Training to failure can enhance metabolic stress, which has been implicated in hypertrophic gains, as well creating a greater hypoxic environment in the muscle, which again is associated with anabolism”.
Leaving gas in the tank or not lifting heavy enough for the rep count in question, will not recruit all the muscle fibers, thus reducing your potential for improving your strength and muscle size.
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