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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 - SSCE Personal Development and Physical Education - Question 2 - 2016 - Paper 1
Question 2
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) ... show full transcript
Worked Solution & Example Answer: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 - SSCE Personal Development and Physical Education - Question 2 - 2016 - Paper 1
Step 1
Identify the most likely cause of fatigue in a runner completing a 100 m sprint
Answer
In a 100 m sprint, the effort is predominantly anaerobic, meaning that the body relies on energy systems that do not require oxygen. One primary source of energy in this type of fast, intense activity is phosphocreatine. As phosphocreatine stores are depleted during high-intensity activities, this can lead to fatigue. Therefore, the most likely cause of fatigue in this scenario is:
(D) Depletion of phosphate creatine.