Energy for Performance
This term in year 11 senior physical education we have been learning the use of the three energy systems and how they are used in the game of touch football and how they function together. To understand the energy systems, our class went through a number of fitness tests.
The Adenosine Triphosphate (ATP) stores in the muscle and lasts for approximately 2 seconds and the resynthesis of ATP from Creatine Phosphate (CP) will continue until CP stores are used up, which is approximately 4-6 seconds. This gives us around 5-10 seconds of ATP. The use of ATP in touch football is high intensity, it would be used in a 50m sprint or a pass in touch. Once the Creatine Phosphate stores have worn out, the body resorts to stored glucose for ATP. The breakdown of glucose or glycogen in anaerobic conditions results in the production of lactic acid. The build up of ions is the restrictive issue causing fatigue in runs of 300m – 800m. The lactic acid system is most affective around 30seconds to 2-3 mins. In touch football the use of the lactic acid system may be used when wrucking the ball, as it is a constant sprint with little or no rest. The aerobic energy system utilizes protein, fats and carbohydrates (glycogen) for resynthesising ATP. The aerobic system is most effective at 5 mins onward. This energy system can be developed with various intensity runs. The types of runs are, Continuous runs – long slow runs at 50-70% of highest heart rate. This places demands on muscular and liver glycogen. The normal response by the system is to enhance muscle and liver glycogen storage capacities. This run would be the warm up run that we take of the oval before getting into the game. Extensive runs – continuous runs at 60-80% of maximum heart rate. This places demands on the system to cope with lactic acid production. Running at this level helps the removal and turnover of lactic acid and the body’s ability to tolerate the larger levels of lactic acid. The...
Please join StudyMode to read the full document