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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 | Distan... 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. Label the axes.
Answer
To effectively draw the line graph:
- Label the axes: The x-axis will represent 'Distance (m)' ranging from 0 to 800, while the y-axis will represent 'Heart rate (bpm)' ranging from 80 to 200.
- Plot the points based on Table 1: (0, 80), (200, 130), (400, 140), (600, 160), (800, 200).
- Connect the points with straight lines to represent the changes 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 than his resting heart rate due to several factors:
- Warm-up Effects: He may have elevated his heart rate by warming up, preparing his body for the physical exertion ahead.
- Anticipatory Rise: There is usually an anticipatory rise in heart rate as athletes prepare for competition, triggered by adrenaline release.
- Physical and Psychological Factors: Excitement or stress from the race can stimulate an increase in heart rate, elevating it above the resting level.
Step 3
Explain three factors that can affect Chris's speed of recovery.
Answer
Three factors that can affect Chris's speed of recovery include:
- Fitness Level: An experienced runner will generally recover quicker due to a better aerobic capacity.
- Age: As Chris is 25 years old, his heart rate will decrease quicker than that of an older person.
- Hydration and Nutrition: Ensuring he is properly hydrated and nourished will support faster recovery, as it replenishes energy stores and facilitates metabolic processes.
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 to accommodate the greater oxygen demand of his muscles. Initially, as he starts to run, his tidal volume will rise to meet the increased metabolic requirements. As the race progresses and as he approaches exhaustion, tidal volume may plateau or slightly decrease as he begins to fatigue, although respiratory rate may increase to compensate for the change.