Unit 2: the Physiology of Fitness Assignment: No 1

1873 Words8 Pages
Unit 2: The Physiology of Fitness Assignment: No 1 Task 1.a Task1b Musculoskeletal response Increased blood supply The short term effects of exercise on your muscles include an increase in temperature and metabolic activity. Result: - greater demand for oxygen in blood supply through capillary dilation. Increase in muscle pliability When you warm up your muscles during activity makes them more pliable and reduces the risk of injury. Increased range of movement The short-term effect of exercise are demonstrated by changes within the joint. Movement of joints stimulates the secretion of synovial fluid. The fluid also becomes less viscous and the range of movement at the joint increases. Muscle fibre micro tears Muscles under stress tiny tears occur in the muscle fibre Micro tears swelling in the muscle tissue pressure on the nerve endings and pain Training improvements will only be made if the body has sufficient fuel and rest to repair these micro tears , making the muscle a little bit stronger than it was before. Energy system Creatine phosphate energy system ADP + creatine phosphate ATP+ creatine ATP and creatine phosphate (PCr) make up the ATP-PCr system. It is the immediate energy system. Creatine phosphate is a high energy compound. Exercise intensity high PCr phosphate stored in muscle is broken down to provide energy to make ATP. When the high energy bond in PCr is broken, the energy it releases is used to resynthesise ATP. Lactic acid energy system Glucose 2ATP + 2 lactic acid + heat Glycogen 3 ATP + 2 lactic acid = heat This is the short-term energy system. This is an anaerobic process Not suitable over a long duration Around 60 to 90 seconds of maximal work is possible using this system (for example: 400m race)

More about Unit 2: the Physiology of Fitness Assignment: No 1

Open Document