Primary Anabolic Hormones | CSCS Chapter 4

Resistance training induces specific hormonal adaptations that facilitate muscle growth, tissue repair, and metabolic efficiency. Large muscle group exercises, such as squats and deadlifts, significantly elevate serum testosterone, particularly when performed with heavy loads between 85% and 95% of one-rep max. Growth hormone plays a critical role in collagen synthesis and fat breakdown, with shorter rest intervals effectively boosting its secretion. While cortisol acts as a catabolic hormone by facilitating gluconeogenesis, acute increases contribute to muscle remodeling and glucose maintenance, provided there is adequate recovery. Furthermore, catecholamines like epinephrine enhance force production and muscle contraction rates, serving as a primary endocrine response that can be triggered by mental visualization and aggressive intent. Managing these hormonal responses through strategic programming, sleep, and nutrition is essential for optimizing long-term athletic performance and recovery.