Saturday, May 11, 2013

The Third Energy System

There's aerobic and anaerobic... and there's also phosphocreatine.

By Alex Hutchinson Published May 10, 2013


Interesting bit of trivia about energy use during exercise, from a new paper in theEuropean Journal of Applied Physiology by researchers in Portugal. We (i.e. endurance-oriented folks) normally think about two different types of energy production: aerobic and anaerobic. Aerobic is what dominates for longer, lower-intensity efforts, where your hearts and lungs are able to keep pace with the oxygen demands of your muscles. Anaerobic comes into play for shorter, higher-intensity efforts -- and we usually associate it with lactate, which is a by-product (as well as a fuel) in the reactions that produce ATP without oxygen.

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