How does training affect performance?
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1 Name: How does training affect performance? CQ1 DP1 energy systems alactacid system (ATP/PC) lactic acid system aerobic system analyse each energy system by exploring: source of fuel efficiency of ATP production duration that the system can operate cause of fatigue by-products of energy production process and rate of recovery
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3 HSC EXAM What is the most effective source of fuel for replenishing energy stores after an athlete has completed a 800 metre track event? (A) Fat (B) Fibre (C) Protein (D) Carbohydrate HSC EXAM Which of the following will contribute to fatigue of the aerobic energy system? (A) An increase of blood glucose and muscle glycogen (B) An increase in lactic acid and creatine phosphate (C) A decrease in lactic acid and creatine phosphate (D) A decrease of blood glucose and muscle glycogen Use the graph below to answer Questions 18 and Which curve best represents the aerobic energy expenditure? (A) W (B) X (C) Y (D) Z 19 Which curve represents the energy system which relies primarily on glucose in the blood as its fuel source for a quick supply of ATP? (A) W (B) X (C) Y (D) Z
4 HSC EXAM What is increased by an athlete s use of creatine supplementation? (A) Phosphocreatine stores and muscle glycogen (B) Phosphocreatine stores and the ability to resynthesise ATP (C) Haemoglobin concentration in the blood and muscle glycogen (D) The ability to break down lactic acid and to resynthesise ATP HSC EXAM What is a common feature of both the alactacid and lactic acid energy systems? (A) Lactic acid is produced. (B) ATP is resynthesised anaerobically. (C) Both systems take the same period of time to recover. (D) The accumulation of lactic acid in the working muscles causes fatigue. HSC EXAM 2014 Question 27 (5 marks) Compare the two anaerobic energy systems. 5 Marks HSC EXAM What is the cause of fatigue for the alactacid system? (A) Lack of essential amino acids (B) Lack of muscle glycogen stores (C) Inability to re-synthesise phosphate creatine (D) Inability to convert carbohydrates to glycogen
5 HSC EXAM What is the most likely cause of fatigue in a runner completing a 100 m sprint? (A) Dehydration (B) Accumulation of lactic acid (C) Depletion of muscle glycogen (D) Depletion of phosphate creatine HSC EXAM What are the waste products of the aerobic energy system? A. Lactate, heat, water B. Lactate, oxygen, creatine C. Carbon dioxide, heat, water D. Carbon dioxide, oxygen, creatine Question 25 (7 marks) Compare TWO different energy systems by exploring their duration, sources of fuel and causes of fatigue. Use examples to support your answer. 7 marks Sample answer: ATP/PC is an anaerobic energy system that does not require oxygen, compared to the aerobic system which does require oxygen. There is enough residual supply of ATP in our bodies to produce explosive muscular contractions over a very short period of time. The explosive movement causes a breakdown of the phosphate molecules in ATP to ADP and the by-product is energy. The system then relies on creatine phosphate to resynthesise ADP back to ATP, giving this system about seconds of intense energy. The supply of ATP, while limited in duration, recovers quickly (approximately two minutes) but its high-energy release is optimal for repeated explosive activities with a rest period. The aerobic system does not facilitate high-energy release. For example, long jump and weightlifting largely call upon this energy system for peak performance. By comparison, the aerobic system generates energy in the presence of burning oxygen. The system sources fuel from our body s carbohydrate, fat and protein stores. The aerobic system can last for hours and really only becomes fully depleted when the sources of fuel are exhausted or oxygen is no longer present. Athletes such as marathon runners become fatigued during their event as they deplete their glycogen stores in their blood and liver, followed by their fat stores and then finally the readily available protein being stored in their muscles.
How does training affect performance?
Name: How does training affect performance? CQ1 DP1 energy systems alactacid system (ATP/PC) lactic acid system aerobic system analyse each energy system by exploring: source of fuel efficiency of ATP
How does training affect performance?
Name: How does training affect performance? CQ1 DP1 energy systems alactacid system (ATP/PC) lactic acid system aerobic system analyse each energy system by exploring: source of fuel efficiency of ATP
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