What does a pedometer measure?

• A. A person's respiratory rate
• B. A person's heart rate
• C. The amount of distance a person has covered by measuring their steps
• D. The amount of sweat a person has perspired

Answer: (C)

Pedometers count steps by sensing movement, typically detecting the hip or body motion as you walk. The value they provide for distance comes from taking the number of steps and multiplying by an estimated stride length, giving an estimate of how far you’ve covered. Because they rely on step detection rather than physiological sensors, they don’t measure respiratory rate, heart rate, or sweat. So the best description is that a pedometer measures the distance a person has covered by measuring their steps, using step count and an estimated stride length.