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Aerobic and anaerobic respiration: How is glucose used and lactic acid…
Aerobic and anaerobic respiration: How is glucose used and lactic acid produced?
Why Does Lactic Acid Build Up in Muscles? And Why Does It Cause Soreness?
Sometimes when the production is faster than our bodies can adequately deliver oxygen, what happens is that the working muscles generate energy anaerobically.
As a consequence of hard exercise the acidity of the muscle cells increases, this is not bad because it's just a natural defense mechanism.
Our body prefers to generate its energy using aerobic methods (with oxygen).
Lactic acid is not responsible for muscle pain, the actual responsible is the lactate and as result it leaves the burning sensation often felt inactive muscles.
Anaerobic Respiration, means without oxygen and is a process in which organic food is converted into chemical energy (ATP).
In anaerobic exercise, the energy demand is high, so our body uses lactic acid fermentation to provide the energy needed.
In lactic acid fermentation respiration is only used for short-term periods.
If oxygen is not present, pyruvate is not broken down further and no more ATP is produced
Where do lactic acid fermentation and anaerobic respiration occur?
The fermentation of lactic acid is an anaerobic process so both anaerobic respiration and lactic acid fermentation happen in the fluid part of the cytoplasm of the cells, while the majority of the energy production in aerobic respiration takes place in the mitochondria.
"In this process, the enzyme converts the pyruvic acid produced in glycolysis into a three-carbon molecule called lactic acid."
Fermentation is conducted by bacteria, converting carbohydrates into lactic acid.
Anaerobic respiration has a pretty high speed. It produces ATP very quickly. Aerobic respiration, on the other hand, produces ATP rather slowly.
Fermentation protects the cells from dying during intense exercise when the red blood cells fail to provide adequate oxygen to the body cells, due to under-oxygenation.
When fermentation takes over it releases lactic acid which keeps the cells of the body intact during the earlier-mentioned cycles of under-oxygenation.
The production of lactate helps to reduce acidity in the blood and muscles trying to keep a fair pH level.
Lactic acid is harmless in our bodies. It increase while doing exercise intensely but it returns to normal levels while resting.
Muscle cells produce lactic acid to give energy when there is not enough oxygen in the body.
Some ways to remove lactic acid from muscles are:
Warming up and stretching. Stretching can help stimulate circulation, relieve tension, and increse flexibility. It brings more oxygen to the muscles that can reduce lactic acid production and get rid of any accumulation.
Breathing well. A 1994 study found that athletes who practiced breathing exercises incresed their performance without increasing their lactic acid levels
Staying hydrated. It is important to saty hydrated before, during and after exercising since it can help replenish any fluids lost during workout, relieve sore muscles, prevent muscle cramps, etc.
Athletes produce less amount of lactic acid because the body creates supplementary proteins that help absorb and convert lactic acid to energy.
Lactic anaerobic energy is the primary energy system in sports and so it requires maximum effort for a period of 20 to 120 seconds is a very brief period because people can't maintain the high intensity for so long.
Lactic acid reduces the ph levels of muscle fibers, which then turns to more acid in the muscles. And it allows the muscles to keep contracting at high rates.
Martina Salas, Manuela Calero and Xiu
