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Chris is an experienced 25-year-old 800m runner - AQA - GCSE Physical Education - Question 10 - 2023 - Paper 1
Question 10
Chris is an experienced 25-year-old 800m runner. Table 1 shows Chris's heart rate in beats per minute (bpm) at the start and during an 800m race. Table 1 Distance ... show full transcript
Worked Solution & Example Answer:Chris is an experienced 25-year-old 800m runner - AQA - GCSE Physical Education - Question 10 - 2023 - Paper 1
Step 1
Draw a line graph on the graph paper below to show Chris's heart rate at the start and during an 800m race.
Answer
To accurately draw the graph, follow these steps:
- Label the axes: The horizontal axis (x-axis) should represent 'Distance (m)' ranging from 0 to 800 meters, while the vertical axis (y-axis) represents 'Heart Rate (bpm)' ranging from 80 to 200 bpm.
- Plot the points: Using the data from Table 1, mark the points (0,80), (200,130), (400,140), (600,160), and (800,200) on the graph.
- Connect the points: Draw a line connecting the dots to illustrate the increase in heart rate as the distance increases.
Step 2
Explain why Chris's heart rate is higher at the start of the race than his resting heart rate.
Answer
Chris's heart rate is higher at the start of the race due to several physiological factors. Initially, he may be experiencing an anticipatory rise, where his body prepares for physical exertion by releasing adrenaline, which elevates the heart rate. Additionally, Chris might have warmed up prior to the race, further contributing to an elevated heart rate as his muscles require more oxygen and nutrients.
Step 3
Explain three factors that can affect Chris's speed of recovery.
Answer
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Fitness Level: A well-trained athlete like Chris is likely to recover quicker than someone less fit due to a more efficient cardiovascular system that can clear lactate and restore normal heart rate faster.
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Hydration: Staying hydrated is vital for recovery. If Chris is dehydrated, it could delay recovery as fluids help transport nutrients and remove waste products from the body.
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Nutrition: Proper post-exercise nutrition can speed up recovery. Consuming carbohydrates and proteins can replenish glycogen stores and repair muscle tissues, thus aiding in a quicker recovery process.
Step 4
Step 5
Explain the changes that occur to Chris's tidal volume during the 800m race.
Answer
During the 800m race, Chris's tidal volume will increase significantly due to the heightened demand for oxygen by his muscles. As he engages in vigorous exercise, his body requires more oxygen to produce energy, leading to deeper breaths. This increase in tidal volume allows for greater ventilation and enhances his performance by meeting the oxygen requirements more effectively.