Energy Systems: How they work and when they are in use
Why does a sprinter only run as fast as they can for short distance before they begin to slow down? Why don't they run that fast for longer distances? Well it's a simple concept really, their body can't keep up with the energy demands it is asking for. Our bodies use energy called ATP or Adenosine triphosphate to do all things and without ATP our bodies don't survive. To replenish this ATP our bodies have two energy systems that we use at all times depending on the energy demand. The energy demand is based on the intensity and also the duration of activity. These two energy systems are called aerobic and anaerobic. Aerobic means that the body is using oxygen and anaerobic means that the body is not using or in the presence of oxygen. These systems have different abilities when it comes to replenishing ATP for energy. The anaerobic energy system breaks up into two different systems. The phosphagen system- This system provides ATP primarily for short-term, high-intensity activities such as sprinting and resistance training. This energy system relies on hydrolysis of ATP (when the energy is released) and the breakdown of another high-energy phosphate called Creatine phosphate or phosphocreatine. ADP combined with Creatine phosphate creates ATP for energy and for this to occur Creatine kinase has to synthesize this combination. This system is used during high explosive activities that last for about 6 seconds. This system has the ability to replenish a small number of ATP very quickly. This becomes a problem when the energy demands are too great for this system, so the body begins to rely on a new system more. The glycolysis system- This system is also anaerobic and is [...]


