Which device measures heart rate or the intensity of activity through heart rate?

Which device measures heart rate or the intensity of activity through heart rate?

• A. Activity trackers record energy expenditure.
• B. Pedometers measure step count.
• C. Accelerometers measure acceleration.
• D. Heart rate monitors measure heart rate or the intensity of activity through heart rate.

Answer: (D)

This item focuses on identifying devices that quantify aspects of physical activity, especially using heart rate to gauge effort. A heart rate monitor is designed to measure how fast the heart is beating, providing beats per minute and often guiding you to stay in a target intensity zone. Because exercise intensity is closely linked to heart rate, this device directly reflects how hard you’re working. Other devices like pedometers count steps, accelerometers track movement speed and direction, and activity trackers estimate energy expenditure from movement data, but they don’t inherently measure heart rate to indicate intensity. So the heart rate monitor best fits the goal of measuring heart rate and the level of exertion.

This item focuses on identifying devices that quantify aspects of physical activity, especially using heart rate to gauge effort. A heart rate monitor is designed to measure how fast the heart is beating, providing beats per minute and often guiding you to stay in a target intensity zone. Because exercise intensity is closely linked to heart rate, this device directly reflects how hard you’re working. Other devices like pedometers count steps, accelerometers track movement speed and direction, and activity trackers estimate energy expenditure from movement data, but they don’t inherently measure heart rate to indicate intensity. So the heart rate monitor best fits the goal of measuring heart rate and the level of exertion.