5b_Energy+Expenditure+and+Fatigue_Review_Sheet

5b_Energy+Expenditure+and+Fatigue_Review_Sheet - Energy...

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Unformatted text preview: Energy Expenditure and Fatigue Reading Assignment: Students should read Chapter 4 and refer to lecture notes when completing this review. Section 1: Definitions. Where appropriate, include illustrations and/or a description of what conditions, hormones, enzymes engage the given process, etc. 1) Lactate Threshold/OBLA 4) Oxygen Uptake (VO2) 2) Steady ­rate/steady ­state VO2 5) Oxygen debt/EPOC 3) Oxygen Deficit 6) VO2max Section 2: Short Answers 7) Rank in order from fastest to slowest, the rate at which ATP is produced from the following energy systems: a) the Aerobic Energy System; b) ATP ­PCr energy system; and c) Anaerobic Glycolysis. 8) Rank in order from greatest to least, the amount of ATP per energy substrate is produced via the following energy systems: a) the Aerobic Energy System; b) ATP ­PCr energy system; and c) Anaerobic Glycolysis. 9) Provide 3 examples of events that result in rapid, large increases in blood LA. 10) Refer to your power point presentation, exercising at 60% of VO2max, what is the percent contribution to energy production of: i) Fat? ii) Carbohydrate? 11) Explain why aerobic exercise training (at or slightly above OBLA) increases the intensity of exercise at which lactate threshold occurs. 12) State the impact that a right shift in OBLA will have on performance of an event that requires sustained work for an extended period of time. 13) Predict who should win an endurance race based on the exercise intensity that OBLA occurs (in other words, is a person with a lower OBLA or a higher OBLA expected to win). 14) Explain why an athlete might want to train at or slightly above OBLA. Identify the adaptations that result from training at/slightly above OBLA. 15) Identify what muscle fibers and energy systems are primarily engaged: i) below OBLA, and ii) at or above OBLA. 16) Describe the relationship between magnitude of oxygen debt/EPOC and exercise: i) Intensity: ii) Duration: 17) Explain why oxygen uptake remains elevated after cessation of exercise. 18) List the sources of fuel used at rest, at the beginning of exercise, during 20 minutes of exercise, and during 2 hours of exercise. 19) Estimate the percent contribution of fat and carbohydrate during 1 hour as well as 3 hour of moderate exercise Describe what happens to the proportion of energy derived from fat as exercise duration increases as well as exercise intensity increases. 20) Describe what happens to the proportion of energy derived from carbohydrate as exercise duration increases as well as exercise intensity increases. 21) Compare rate of fat metabolism to percent of fat contribution as intensity of exercise increases and use this as part of an argument for why moderate ­to ­high intensity versus low ­to ­moderate intensity exercise would result in greater total energy expenditure from fat. 22) Relate training level to fat contribution for a given exercise workload and explain why training impacts mixture of fuel utilization during exercise. 23) What impact does aerobic training have on energy metabolism, esp. with regard to substrate contribution (i.e., fat versus carbohydrate) of ATP? 24) For production of ATP, what are 3 examples of events that primary rely on: i) The ATP ­PCr energy system? ii) Anaerobic glycolytic energy system? iii) Aerobic energy system/Oxidative Phosphorylation? 25) What are 3 examples of events that rely on a combination of anaerobic and aerobic energy systems for the production of ATP? 26) To reach steady ­state, how long does it take: i) A trained athlete? ii) An untrained person? 27) Between a trained and untrained athlete, who is expected to have a smaller: i) Oxygen deficit? ii) EPOC? 28) Why can’t the oxidative phosphorylation provide the ATP to fuel the initiation of exercise? 29) What is the most important factor in determining the magnitude and duration of oxygen deficit and EPOC? 30) What is the most valid measure of physical fitness? 31) During graded exercise (i.e., exercise intensity increases incrementally), when does lactic acid begin to rise in an exponential fashion for: i) An untrained person? ii) A trained person? 32) Why does lactic acid accumulate during high intensity exercise? 33) What is the importance in determining a person’s lactic acid threshold? 34) How does mixture of fuel burned during exercise change as intensity increases? 35) During sustainable exercise (i.e., ranging from moderate to high intensity), how long does it take for glycogen to become depleted? 36) For fat loss, why may it not optimal to recommend low intensity versus moderate to high intensity exercise? 37) Between a trained and untrained person, who will burn more fat at a given submaximal workload? 38) Why does fat metabolism change with training? 39) What is the relationship between mixture of fuel used and (a) duration of exercise, (b) intensity of exercise, (c) fitness level, and (d) nutritional status. ...
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