ANSWERS Identify which athlete is the trained and untrained athlete? Justify your response Trained athlete is Athlete B as their LIP is delayed (reached at higher intensities) Untrained athlete is Athlete 1 as they achieve LIP at intensities, indicating that they rely on their Anaerobic Glycolysis energy system earlier. Has athlete 2 reached LIP and how did you come to this conclusion? Yes at around the 20 min mark of exercise LIP is the last point at which Lactate is at a steady state (lactate production=lactate removal) After the LIP, lactate will continue to rise rapidly in the blood stream What would be the most suitable method of recovery for athlete 2? As Athlete 2 has completed an Aerobic ES dominant activity (longer than 90 secs) and also had an increased contribution from the anaerobic glycolysis energy system it would be best to perform an ACTIVE recovery. This will aid the removal of Metabolic by-products by maintain a higher O2 levels whilst also having a higher Q. What is the predominant energy system during each speed for athlete 1? Aerobic ES would be dominant for all three speeds, however there would be an increased contribution from the Anaerobic Glycolysis ES during the 3rd stage (13km/h). This is evident due to the increase in Lactate, which is a by-product of this system. What is the main cause of fatigue in stage 3? During 3, blood lactate levels are increasing which indicates that H+ would also be accumulating in the muscles. Increased H+ concentrations will result in an increased acidity in the muscle which intern slows the breakdown of glycogen and release of energy. Identify which energy system utilises fats as an energy source? The Aerobic energy system as the graph indicates that fats are utilised at lower intensities (% of HR).
ANSWERS Identify which athlete is the trained and untrained athlete? Justify your response Trained athlete is Athlete B as their LIP is delayed (reached at higher intensities) Untrained athlete is Athlete 1 as they achieve LIP at intensities, indicating that they rely on their Anaerobic Glycolysis energy system earlier. Has athlete 2 reached LIP and how did you come to this conclusion? Yes at around the 20 min mark of exercise LIP is the last point at which Lactate is at a steady state (lactate production=lactate removal) After the LIP, lactate will continue to rise rapidly in the blood stream What would be the most suitable method of recovery for athlete 2? As Athlete 2 has completed an Aerobic ES dominant activity (longer than 90 secs) and also had an increased contribution from the anaerobic glycolysis energy system it would be best to perform an ACTIVE recovery. This will aid the removal of Metabolic by-products by maintain a higher O2 levels whilst also having a higher Q. What is the predominant energy system during each speed for athlete 1? Aerobic ES would be dominant for all three speeds, however there would be an increased contribution from the Anaerobic Glycolysis ES during the 3rd stage (13km/h). This is evident due to the increase in Lactate, which is a by-product of this system. What is the main cause of fatigue in stage 3? During 3, blood lactate levels are increasing which indicates that H+ would also be accumulating in the muscles. Increased H+ concentrations will result in an increased acidity in the muscle which intern slows the breakdown of glycogen and release of energy. Identify which energy system utilises fats as an energy source? The Aerobic energy system as the graph indicates that fats are utilised at lower intensities (% of HR).
unit_3_aos_2_practice_questions.docx