How Does it Work? - Fitness Trackers

Sarah explores her new fitness tracker, learning about its sensors and capabilities. The device uses photoplethysmography to measure heart rate and an accelerometer for activity tracking. It also monitors sleep patterns using movement and heart rate variability. Data is synced to an app for analysis, providing insights and trends. Sarah ensures her data privacy is protected, appreciating the technology's complexity and utility.

What technology does Sarah's fitness tracker use to measure her heart rate?

• Electrocardiography

• Photoplethysmography

• Magnetocardiography

• Thermography

How does the accelerometer in Sarah's tracker help her?

• It measures her heart rate.

• It tracks her sleep patterns.

• It measures her movements in three dimensions.

• It monitors her hydration levels.

What data does the fitness tracker use to assess Sarah's sleep patterns?

• Heart rate and temperature

• Movement data and heart rate variability

• Calorie intake and steps

• Blood pressure and oxygen levels

How does Sarah's fitness tracker sync data to her smartphone?

• Via Wi-Fi

• Via Bluetooth

• Via NFC

• Via USB cable

Why is it important for Sarah to understand the privacy settings of her fitness tracker?

• To improve battery life

• To ensure her device is waterproof

• To protect her sensitive health data

• To increase the accuracy of the tracker