Testosterone & Exercise
topic
Testosterone is the primary anabolic hormone in both males and females — critical for muscle protein synthesis, bone density maintenance, libido, motivation, cognitive function, erythropoiesis (red blood cell production), and body composition regulation. Resistance training acutely elevates testosterone (particularly with compound movements at moderate-to-high intensity, short rest periods, and high volume) and chronically maintains higher resting testosterone levels compared to sedentary individuals, while excessive endurance training without resistance training and severe caloric restriction both suppress testosterone production.
Role
Testosterone maintenance through resistance training is one of the most compelling hormonal arguments for regular strength training across both sexes — with testosterone declining approximately 1–2% annually after age 30 in men without interventions, and resistance training being the most effective natural countermeasure. The motivation, confidence, muscle mass, bone density, and cognitive clarity associated with adequate testosterone are qualities that the majority of people experiencing their age-related decline attribute to life circumstances or aging itself, not recognizing that the biological variable underlying many of these changes is addressable through a twice-weekly resistance training habit.