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Resistance Training Substrate

Meaning

Resistance Training Substrate refers to the immediate biological fuel sources and structural components mobilized and utilized by skeletal muscle tissue during high-intensity mechanical loading designed to provoke an adaptive endocrine response. Key substrates include intramuscular phosphocreatine, stored glycogen, and circulating free fatty acids, which determine the immediate energy supply for force production. The efficiency with which these substrates are utilized directly impacts the signaling cascade that follows exercise, influencing post-training hormone release patterns. Understanding substrate availability is essential for optimizing the anabolic window following strength work. These resources power the adaptive signal.