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gnment 1 - How the body responds to acute exercise
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jordan
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thats a weird looking tree what breed do you reckon it is 

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thats a weird looking tree what breed do you reckon it is 

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the ideal man ladies be afraid of him he will touch your mothers children

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niggas by like dam

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WHAT U SAYING FAMMMM

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this is the most effective energy system and the slowest. it is used in long distance physical activiity because it produces far more ATP than either of the other energy systems but much more slowly, therefore it cannot fuel intense exercise that demands the fast production of ATP.

this is used in long lasting physical activity because it releases energy slowly allowing the athlete to have energy through out the event.

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the lactic acid system is an anaerobic energy system in which the high level ATP is manufactured from the breakdown of glucose to pyruvic acid in the muscle cells. this energy system can only be used for up to 3 minuets.

this energy system would be used in the 400m race because it is a middle distance event where the participant isn't using explosive power nut also not doing activity for a long time.

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ATP-PC system consists of adenosine triphosphate (ATP) and phosphocreatine (PC). This energy system provides immediate energy through the breakdown of these stored high energy phosphates.

this energy system is used in sports such as shot put and javelin because the athlete uses short explosive movements to throw the object as far as they can.

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The exchange of gases between the alveoli and bloodstream (O2 & C02)

Increase in pressure causes increase in diffusion of gases. this allows for more 02 to be delivered to the working muscles, in addition to more C02 being removed from the blood stream which is a waste product the body does not need.

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Tidal volume is the volume of air you breathe in a single breath. It is necessary that our body effectively meet and increases oxygen which must need. the volume of air taken in is the minute volume. Increased tidal volume increases the pressure in the lungs.
respiratory system  x tidal volume = minute volume

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this is the amout of breaths you take in a minuet. Your heart speeds up to pump extra oxygen to the muscles. and to get rid of more carbon dioxide. the breathing rate will increase as long as intensity increases but it will plateau if exercise intensity remains the same. the breathing rate will eventually plateau when the athlete reaches their maximal level for oxygen consumption.

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Vasoconstriction is the narrowing of the arteries and vasodilation is the widening of arteries on their way to delivering oxygenated blood to where needs it most in the body. , when we exercise are blood vessels go through vasodilation on the way to the working muscles to allow our blood to flow faster and be pumped around the body quicker, whereas vasoconstriction occurs towards the GI tract.

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BP is the pressure of blood against the walls of your arteries.

When we take part in physical activity for a short period of time our blood pressure increased and this is because the heart is forced to pump faster and more blood is flowing around the body at a quick rate.

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During exercise, adjustments are made by the cardiovascular system

this ensures adequate delivery of oxygen and nutrients to the muscles to continue with the exercise
Oxygen demand is much higher during physical activity then it is at rest. The activity responses include an increased heart rate, increased stroke volume and increased cardiac output. All of these contribute ot an increased delivery of 02 to the working muscles during exercise.

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Before you start exercising your heart rate already starts to increase and this is known as your anticipatory heart rate. Before acute exercise this happens because a chemical from the nervous system is released, as well as a hormone from your adrenal gland. When we take part in sporting activity the cardiovascular system has to work harder because our muscles require more oxygen to function.

this is good for a rugby player because the increase of adrenalin will give the athlete more energy and they will be more redy for the match

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as stress increases on muscles tiny micro tears appear

this will cause swelling in the muscles which creates pressure on the nerve endings and pain

noticeable changes will only be seen if the body has the right  fuel and rest to repair the micro tears.

when the muscles repair they will be stronger.

this is useful for a weight lifter because muscle fibre tears will result in an increased muscle mass and there for make the athlete better at there event.

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this is when the muscles because looser and more flexible as they become warmer so it allows more movement. When the muscles become looser our range of movement increases as this will help us stretch beyond the point we would usually be able to reach.

this is good for an athlete because more having pliable muscle lowers the chance of injury

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Joint movement stimulates the secretion of synovial fluid in the joints in the body.

The fluid becomes less viscous and the R.O.M. at the joint increases. This allows for a greater lubrication of the joint.

this is useful for an gymnast because having an increased range of movement will allow the athlete to do there best in there event.

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Blood flow is greater when you exercise because the blood vessels in your muscles dilate.
The greater demand for oxygen is met by an increase in blood supply through capillary dilation

Increased blood supply triggered by the brains detection of increased toxins in the blood

this is useful for a athlete during a warm up because an increase in blood flow will supply more oxygen to the muscles