In one regimen the muscle is worked at a moderate rate allowing it to get it's energy from aerobic metabolism, in the other it is worked intensely enough to force it to use anaerobic glycolysis. After the latter regimen the muscle swells.
Given this setup you can't dissociate the strong physical forces present in the intense workout from the movement into the anaerobic regime, so I don't think that this experiment shows what you think it does. A proper experiment would involve direct injection of waste products into the muscle tissue and observation of the results.
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