Anaerobic Exercise is higher intensity exercise than aerobic exercise and uses up oxygen more quickly than it can be replenished in the muscles. Resistance training such as strength training and bodybuilding is anaerobic exercise, which primarily relies on fast-twitch muscle fibers. These muscle fibers do not possess much mitochondria and so much create energy without oxygen. The primary means of producing this energy is the process of glycolysis which, although it produces only about 5 percent as ATP per glucose molecule as aerobic respiration, is much more rapid.
Anaerobic training, in the strictest sense, is training that relies primarily on the phosphagen system and glycolosis, which are energy transfer processes that operate in the absence of oxygen, thus the term AN-aerobic wherein the AN means not or without.
Anaerobic metabolism operates during activities which require an immediate and rapid supply of energy to the working muscles. Any all out activity, within the first two minutes or so, would use anaerobic energy.
Muscles cells also have a small amount of stored ATP, estimated to be able to fuel a 2 to 5 second burst of muscle contraction, upon which time stored creatine phosphate can be used to rapidly regenerate ATP for up to 15 seconds.
This page created 09 Sep 2011 14:02
Last updated 02 Mar 2016 20:27