ETD

• Memoria muscolare
• nutrizione ed epigenetica

Muscle memory represents a complex adaptive phenomenon through which skeletal muscle retains biological information derived from previous functional stimuli, enabling a heightened response to subsequent periods of reactivation. Although initially attributed primarily to the persistence of myonuclei acquired during training, it is now widely recognized that this phenomenon substantially involves long-term epigenetic regulatory mechanisms. A growing body of evidence demonstrates that exercise induces stable changes in DNA methylation, histone protein modifications, and chromatin organization, resulting in a long-lasting remodeling of the transcriptional profile of muscle fibers. Specifically, genes involved in protein synthesis, mitochondrial metabolism, and regeneration are maintained in an epigenetically permissive state even after prolonged periods of detraining, thus facilitating accelerated recovery of muscle mass and function during retraining. A further layer of complexity is represented by the role of satellite cells and their interaction with the epigenetic environment. Inflammatory and metabolic mechanical signals modulate the activity of epigenetic enzymes such as DNMTs, HDACs, and sirtuins, influencing cell fate, proliferative capacity, and long-term regenerative potential of muscle. In this context, muscle memory can be interpreted as the result of a dynamic interplay between structural adaptations and persistent epigenetic programming.