Explain how different causes of fatigue affect performance in a 2-minute rowing sprint. (5 marks)
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Sample Answer
- During the initial explosive start, ATP-PCr stores become rapidly depleted within 10 seconds, resulting in an immediate decrease in power output for the rowing stroke.
- The accumulation of lactic acid from the dominant glycolytic system causes the blood pH to drop significantly, interfering with the efficiency of muscle contractions and power generation through the middle section.
- Local muscle glycogen stores begin depleting as the intensity continues, reducing the availability of immediate energy for the working muscles in the latter stages.
- Neural fatigue progressively reduces the efficiency of muscle fibre recruitment, particularly affecting the large muscle groups required for maintaining proper rowing technique.
- The psychological impact of fatigue affects technique execution and power application, leading to a decline in stroke efficiency and overall performance output.
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Sample Answer
- During the initial explosive start, ATP-PCr stores become rapidly depleted within 10 seconds, resulting in an immediate decrease in power output for the rowing stroke.
- The accumulation of lactic acid from the dominant glycolytic system causes the blood pH to drop significantly, interfering with the efficiency of muscle contractions and power generation through the middle section.
- Local muscle glycogen stores begin depleting as the intensity continues, reducing the availability of immediate energy for the working muscles in the latter stages.
- Neural fatigue progressively reduces the efficiency of muscle fibre recruitment, particularly affecting the large muscle groups required for maintaining proper rowing technique.
- The psychological impact of fatigue affects technique execution and power application, leading to a decline in stroke efficiency and overall performance output.