range). Stores of ATPGCp become depleted and sarcoplasmic fatigue begins. This triggers sarcoplasmic growth and the associated blood flow to recover the muscle. Because a portion of the myofibrils are switched off and a lighter weight is being used during diminished range reps, the muscles are fatigued to a greater degree from both the sarcoplasmic and myofibril perspectives. To compensate for this deeper level of fatigue, the blood flow to recover gets stronger—often referred to as a large pump—which forces a stretching of the fascia. (While this has not been specifically studied with X3, it
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