To create a graphical representation of the swimmer's practice, we can follow this structure:
Graph Overview:
- X-Axis: Time (in minutes)
- Y-Axis: Speed (qualitative: Slow, Medium, Fast)
Intervals Breakdown:
- Warm-Up Freestyle (12 minutes): Slow to Medium speed
- Rest (3 minutes): No swimming (place a point on the graph at "Rest")
- Fast Sprint Freestyle (12 minutes): Fast speed
- Rest (3 minutes): No swimming
- Cool-Down Breast Stroke (9 minutes): Slow speed
Graph Construction:
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Plot the Warm-Up:
- From 0 to 12 minutes, the speed rises from Slow to Medium.
- Draw a line segment from (0, Slow) to (12, Medium) to represent this phase.
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Plot the First Rest:
- At 12 minutes, have a point indicating the start of rest.
- For the next 3 minutes (from 12 to 15 minutes), indicate that the swimmer is resting (draw a horizontal line at "Rest" on the Y-axis).
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Plot the Fast Sprint:
- From 15 to 27 minutes (12-minute interval), the speed sharply rises to Fast.
- Draw a line segment from (15, Rest) to (27, Fast).
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Plot the Second Rest:
- At 27 minutes, indicate another resting phase.
- For the next 3 minutes (from 27 to 30 minutes), continue with a horizontal line at "Rest".
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Plot the Cool-Down:
- From 30 to 39 minutes (9-minute interval), the speed returns to Slow.
- Draw a line segment from (30, Rest) to (39, Slow).
Description of Each Interval:
-
0 - 12 minutes: Warm-Up Freestyle (Slow to Medium Speed)
- The swimmer starts off their session with a gradual warm-up in freestyle, transitioning from slow to medium speed to prepare their body.
-
12 - 15 minutes: Rest
- After completing the warm-up, the swimmer takes a 3-minute break for recovery.
-
15 - 27 minutes: Fast Sprint Freestyle
- The swimmer engages in a fast-paced sprint freestyle. This intense effort boosts cardiovascular fitness and speed.
-
27 - 30 minutes: Rest
- Following the intense sprint, another 3-minute rest is taken to allow recovery.
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30 - 39 minutes: Cool-Down Breast Stroke (Slow Speed)
- The swimmer finishes their practice with a cool-down swim in breaststroke at a slow speed, gradually bringing the heart rate down and relaxing the muscles.
Final Note:
This graphical representation of the swimmer's practice would show a zig-zag pattern reflecting the intensity of each activity at various time intervals, effectively illustrating how the swimmer alternates between swimming and resting throughout the practice.