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What factors effect how quickly a person recovers from exercise

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GCSE Coursework Question: What factors effect how quickly a person recovers from exercise? Research: To help me answer this question I went to the library to carry out research. I found out that when a person exercises they produce Lactic Acid in their muscles, this is the lack of oxygen in the body. To make our muscles work we need is energy so if we exercise twice a day we will need more oxygen than a person who just exercises once a day. Increased breathing rate also helps to expel heat from the body, which Increases Carbon Dioxide (CO2) levels in the blood as a result of more Cellular respiration, leads to the acidity of the blood increasing., and the result is an increase in heart rate and breathing rate, in order to expel the CO2 from the blood and exhale it. More blood is therefore passed through the lungs. The main arteries expand to accommodate the increased blood flow. Heart and about blood flow During exercise, the pulse rate would increase, as the heart works harder to supply the muscles with more blood. The blood carries the glucose and sugar which the muscles need to carry out their work. ...read more.


When oxygen is present, glucose can be completely broken down into carbon dioxide and water in aerobic respiration. The glucose can come from three different places: * remaining lactic acid supplies in the muscles * breakdown of the liver's glycogen into glucose, which gets to working muscle through the bloodstream * absorption of glucose from food in the intestine, which gets to working muscle through the bloodstream As you start running. Here's what happens: * The muscle cells burn off the energy they have floating around in about 3 seconds. * The 'phosphagen' system kicks in and supplies energy for 8 to 10 seconds. This would be the major energy system used by the muscles of a 100-meter sprinter or weight lifter, where rapid acceleration, short-duration exercise occurs. * If exercise continues longer, then the lactic acid system kicks in. This would be true for short-distance exercises such as a 200- or 400-meter or 100-meter swim. * Finally, if exercise continues, then aerobic respiration takes over. This would occur in endurance events such as 800-meter, marathon run, rowing, cross-country skiing and distance skating. Anaerobic respiration Anaerobic respiration occurs when there is an 'insufficient' supply rate of oxygen and lactic acid is produced. ...read more.


For instance, when a person has asthma, they might get an attack when they have a cold or they might get an attack when they breathe something that irritates the lungs (such as cigarette smoke, dust or feathers). This causes three changes to take place in your lungs: Cells in the air tubes make more mucus than normal. This mucus is very thick and sticky. It tends to clog up the tubes. The air tubes tend to swell and the muscles in the air tubes tighten. These changes cause the air tubes to narrow and make it hard to breathe. Asthma attacks may start suddenly. Or they may take a long time, even days, to develop. Causes In a person with asthma, the airways narrow in response to 'stimuli' that don't affect the airways in normal lungs. The narrowing can be triggered by many 'stimuli', such as pollens, dust mites, animal dander, smoke, cold air, and exercise. In an asthma attack, the smooth muscles of the bronchi go into spasm, and the tissues lining the airways swell from inflammation and secrete mucus into the airways. These actions narrow the diameter of the airways the narrowing requires the person to exert more effort to move air in and out. Naila Parveen Science Mr.Beresford LC ...read more.

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