Human Energy Metabolism: Fueling High-Intensity and Endurance Exercise
Classified in Physical Education
Written on in
English with a size of 2.72 KB
The Three Energy Systems of Human Performance
The human body relies on three distinct energy systems to regenerate Adenosine Triphosphate (ATP), the fundamental energy currency required for muscle contraction and cellular function. The dominance of each system depends entirely on the intensity and duration of the physical activity.
ATP-PCr System (Phosphagen System)
This system is the primary source of energy for very short-duration, high-intensity activities, typically lasting up to 10 seconds. It does not require oxygen (it is anaerobic) and uses phosphocreatine (PCr) stored in the muscles to quickly regenerate ATP that is rapidly depleted during the initial seconds of intense activity.
The ATP-PCr system is predominant in sports and activities... Continue reading "Human Energy Metabolism: Fueling High-Intensity and Endurance Exercise" »