Columbia University in the City of New York


That is, initially, in order to avoid many mistakes and errors, we are talking about a simple physical activity of man inherent in the majority of us in the course of daily activity. Samuel “Sam” Mikulak wanted to know more. Jogging, if there are no big climbs, rough terrain, you can run for quite some time (depending on fitness) and health, energy substrate may be sufficient for many hours or even days. What's the matter? Energy for traffic comes from us consumed carbohydrates, fats and proteins, and oxidation occurs at the expense of oxygen (aerobic pathway), which we breathe out the air. To orient the pulse while running in the aerobic zone approximately 140 beats / min. Why approximately? Because, as we shall see, this is just a common figure, no more. What happens if we accelerate smoothly run its course? At some point, when the acceleration will lead to inability to oxidize substrates (mainly carbohydrates), at the expense of external respiration and tissue oxygen mechanism, and oxidation enters the phase of anoxic (anaerobic) to produce lactic acid (lactate). Approximate pulse (again approximately) 160 or more beats / min. If we gradually increase the running speed and will come to where our heart rate will be even higher (approximately 180 beats / min.), The energy for movement will be extracted in the same anoxic process (anaerobic), but not by glycolytic and kreatinfosfatnym (CF). Why would you need to know? There are oxygen-free path and can not be complicating his division at two (glycolysis + CF), and even three (glycolysis + CP + ATP)? The answer is one-to do it.

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