Question

interpreting data
the next day, alex went on a run. it was a challenging running session. he used a heart rate monitor to ensure he was training within his target heart rate zone. after completing his run, alex checks his recovery heart rate. within the first minute of resting, he notes that his heart rate has dropped from 170 bpm to 90 bpm.
what does alex’s rapid decrease in heart rate indicate?
○ alex’s heart rate monitor might be malfunctioning, showing incorrect readings.
○ alex’s body is not accustomed to exercise, indicating a poor fitness level.
○ alex’s efficient recovery from the exercise demonstrates a strong cardiovascular system.
○ alex’s hydration levels are higher than required, causing a quick heart rate decline.

Explanation:

• Option 1: There's no info suggesting the monitor is faulty; the decrease is a recovery process, so this is incorrect.
• Option 2: A rapid heart rate decrease after exercise is a sign of good fitness (efficient recovery), not poor fitness, so this is wrong.
• Option 3: A strong cardiovascular system allows for efficient recovery, meaning the heart rate drops quickly as the body returns to normal after exercise. This matches the scenario.
• Option 4: Hydration levels don't directly cause a quick heart rate decline during recovery; recovery is more related to cardiovascular fitness, so this is incorrect.

Answer:

C. Alex’s efficient recovery from the exercise demonstrates a strong cardiovascular system.