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Oxygen Debt

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on 19 November 2013

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Transcript of Oxygen Debt

Oxygen Debt, Muscle Fatigue, Aerobic & Resistance Exercise
Aerobic Exercise
Aerobic exercise is types of physical activities such as running or biking, that help our muscles become stronger and more flexible. This happens because blood supply increases to our muscles.
Resistance Exercise
Resistance exercise is exercise where muscles are pitted against immovable objects. An example would be weightlifting.
Oxygen Debt
Being unable to take in oxygen fast enough to keep muscles supplied with all the needed oxygen to do vigorous work.
Muscle Fatigue
When more effort than normal is required to achieve a desired level of force and your muscles are unable to contract.
Causes:
*Makes overall metabolism more efficient and improves digestion as well as making our skeletal system stronger.

*Heart becomes enlarged so more blood can be pumped in a beat.

*Our body's fat deposits are cleared from the walls of our blood vessels.

*Lungs become more efficient.

*DOES NOT INCREASE MUSCLE SIZE
* Causes muscles to contract with as much force as possible.

*The growth in our muscle cells as we lift weights is what causes our muscles to enlarge.

*Amount of connective tissue to muscle is increased.

*RESISTANCE INCREASES MUSCLE SIZE
By: Katie & Maddie
*During oxygen debt, our muscles break down glucose which releases energy for only a short period of time using anaerobic respiration.
*During the break down, lactic acid accumulates, when muscles lack oxygen, to get more energy back to the muscle.
*Without rest, an active/working muscle beings to tire and contracts more weakly until it stops reacting and contracting.
*lactic acid build-up
Small amounts of lactic acid helps to avoid fatigue, but build-up causes a burning sensation and slows you down.
Learning Targets:
*be able to understand how oxygen debt and muscle fatigue link together.
*be able to compare and contrast aerobic and resistance exercise.
*The breakdown of lactic acid results in a sensation of fatigue when it reaches certain levels in muscles and blood.
*When oxygen levels get exhausted, there is a demand for it.
oxygen consumption
*When your body is unable to absorb enough oxygen to adequately 'feed' the muscles the amounts of energy needed to perform the tasks that your body is requesting.
*While you continue to breath hard after exercise, your body is still trying to pay back the oxygen debt that was created during exercise.
(results from oxygen debt)
*Exercising your muscles strenuously for a long period of time causes muscle fatigue.
*Happens commonly in marathon runners due to the long distance (slowed movements and muscle weakness)
*Relates to the types of exercise- which is why athletes vary their routines and intensity of their workouts.
*calcium flow inside muscle cells:
One of the functions of calcium is to help control muscle contractions, so during high-intensity exercise, small channels in muscle cells leak out calcium which weakens muscle contractions.
*dehydration:
Our body is mostly made up of water which is stored in our muscles to keep them hydrated. The water you lose after exercising needs to be replenished to keep muscle functioning properly.
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