Understanding the Role of Oxygen

Written by Science Knowledge on 2:06 AM

The term aerobic exercise actually means “with oxygen.” When you perform aerobic exercise, your muscles generate the energy you need using a complex series of chemical reactions that involve oxygen. That’s also the reason your breathing speeds up (to get more oxygen) and your heart begins to race (to pump that oxygen-rich blood to the muscles that need it).

Strength training is also called anaerobic exercise, which means “without oxygen.” That’s because the processes that turn oxygen into energy don’t work fast enough to keep up with anaerobic exercise. Instead, your body makes up the difference with a different set of reactions that use the energy stored in your muscles as glycogen. These energy reserves are limited, which is why your muscles can’t sustain anaerobic exercise for long before they seize up.

Incidentally, when you do aerobic exercise, you’re primarily using your slow-twitch muscle fibers. When you do strength training, you’re putting your fast-twitch fibers to work.


Source of Information : Oreilly - Your Body Missing Manual

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In its broadest sense, science (from the Latin scientia, meaning "knowledge") refers to any systematic knowledge or practice. In its more usual restricted sense, science refers to a system of acquiring knowledge based on scientific method, as well as to the organized body of knowledge gained through such research.

Fields of science are commonly classified along two major lines: natural sciences, which study natural phenomena (including biological life), and social sciences, which study human behavior and societies. These groupings are empirical sciences, which means the knowledge must be based on observable phenomena and capable of being experimented for its validity by other researchers working under the same conditions.


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