i know its late but can anyone check this does it sounds right what am i missing?
At rest the main fuel utilised is triglycerides at a slow rate with a yield of 147 ATP molecule from each glucose molecule. When exercise commences the body needs to make a number of physiological changes to accommodate the energy requirements of the activity. There is an increase in demand for oxygen and cardiovascular, muscular and respiratory systems respond to meet these needs.
At the beginning of exercise all three systems begin to produce ATP for energy for movement and muscle contraction. In the first 1-5 seconds the predominant energy system is the ATP PC system, its main fuel utilised is phosphate creatine. This system reaches its peak performance at the 2-4 second mark and continues to produce energy until PC store are depleted at approximately the 10 second mark. The ATP PC system rate is the fastest however it has the slowest yield of 1 ATP molecule from each PC molecule.
When ATP is fully broken down the pc donates an inorganic phosphate to resynthesis ADP-ATP. The main cause of fatigue in this event is the depletion of PC stores another cause of fatigue could be Decreased CNS firing and impaired sodium potassium pump function which will slow down nerve impulses and hence muscular contraction. A passive recovery is necessary as it Allows for the most rapid re-synthesis of ATP-PC
As the rate of energy produced by the ATP-PC system decreases, the Lactic Acid system becomes the dominant provider of energy and movement at approximately the 5 second mark. Its main fuel utilised is glycogen which is broken down from glucose to pyruvic acid to la and finally lactate and hydrogen ions. The LA System reaches its peak between 5-15seconds.The LA system has a fast rate and a yield of 2 ATP molecule from each glucose molecule the aerobic system increases its contribution and takes over from the lactic-acid system as the major energy system contributor at around the 75 second mark.
The main cause of fatigue in this event is the build up of metabolic by products Hydrogen ion (H+) accumulation decreases muscle pH and increases muscle acidity and this interferes with glycolysis enzymes which assist with the breakdown of glucose the best from of recovery for this event would be Active recovery which will help to preventing venous pooling and assist in removal of metabolic by products
The aerobic system increases its contribution and takes over from the lactic-acid system as the major energy system contributor at around the 75 second mark, its main fuel source utilised is glycogen The aerobic System reaches its peak between 1- 1.5 minutes. The aerobic system when used during exercise has a moderate rate and a yield of 36-38 ATP molecule from each glucose molecule. It is the most dominant for anything above the 75 second mark or until exercise finishes. This systems duration is anything beyond 75 second mark.
The main causes of fatigue included Increased body temperature which effects enzymes and can lead to heat stroke .If the athlete is dehydrated this means that they need to conserve water and this further contributes to the increased body temperature because sweating decreases. The blood becomes more concentrated and therefore cardiac output decreases and less oxygen goes to the muscles. Depletion of glycogen stores is another factor which contributes to fatigue. The best from of recovery for this event would be Active recovery which will help to preventing venous pooling and assist in removal of metabolic by products
Overall, all three energy systems have contributed to energy supply and each has been the major ATP producer at various stages of the race. The aerobic system contributes most to energy production, followed by the LA system and the least energy comes from the ATP-PC system.
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