Medical Definition of anaerobic
1a: living, active, or occurring in the absence of free oxygen <during heavy exercise anaerobic respiration occurs, pyruvic acid acts as a hydrogen acceptor, and lactic acid builds up in the tissues> <anaerobic bacteria>b (1): of, relating to, or being activity in which the body incurs an oxygen debt <an anaerobic workout> <Anaerobic activities like sprinting and weight lifting, on the other hand, burn carbohydrates without using oxygen …—Jane E. Brody, The New York Times, 28 Sept. 1986> (2): of or relating to the body's ability to incur an oxygen debt <Your anaerobic threshold is basically how long you can last without breathing (your lungs working in oxygen debt) while, say, sprinting or going as hard as you can on a bike or in the pool.—Bob Condor, The Seattle Post-Intelligencer, 22 Sept. 2008>
2: relating to or induced by anaerobes
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