Freddy Ortiz-Zorrilla, Víctor Roso
Exercise Bioenergetics is a fundamental discipline for understanding the physiological and biochemical processes that make human movement possible. This essay analyzes the main mechanisms of energy production during physical activity and their relevance to school Physical Education. It examines the bioenergetic systems responsible for the resynthesis of adenosine triphosphate (ATP), highlighting the roles of the phosphagen, glycolytic, and oxidative systems according to the intensity and duration of exercise. Furthermore, it addresses the energy metabolism of nutrients, emphasizing the function of carbohydrates, fats, and proteins as essential substrates for muscular activity. The essay also discusses muscle fatigue from a biochemical perspective, considering energy availability, the accumulation of metabolic by-products, and post-exercise recovery processes. Finally, it reflects on the pedagogical implications of this knowledge in school Physical Education, highlighting its contribution to the planning of physical activities, the promotion of healthy lifestyles, and the scientific understanding of human movement. It concludes that bioenergetics strengthens a Physical Education approach grounded in scientific evidence and oriented toward the comprehensive well-being of students.