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Myofibrillar Protein Turnover

Meaning

Myofibrillar Protein Turnover describes the continuous, dynamic process of simultaneous synthesis and degradation of the contractile proteins, such as actin and myosin, that form the structural units (myofibrils) within muscle fibers. This constant renewal is absolutely essential for maintaining muscle quality, enabling adaptation to training stimuli, and facilitating the repair of exercise-induced micro-damage. The net balance between the rates of synthesis and degradation determines whether the muscle experiences hypertrophy (growth) or atrophy (loss).