Understanding Fitness Trackers and Their Functions

Kamri explores how fitness trackers work with Cody Goldhan from Nat Geo. They discuss the components like accelerometers and gyroscopes that detect movement, and how heart rate is monitored using optical scanners and electric currents. The data is processed by a microprocessor. They conclude with a practical demonstration at the gym.

What is Kamri curious about in the beginning of the video?

• How fitness trackers work

• How to use a gym

• How to design a fitness tracker

• How to improve her fitness

What two components are essential for tracking movement in fitness trackers?

• Heart rate monitors and GPS

• Accelerometers and gyroscopes

• Thermometers and barometers

• Pedometers and altimeters

How many axes do most fitness trackers measure?

• Five

• Four

• Three

• Two

What does a gyroscope in a fitness tracker detect?

• The heart rate

• The distance traveled

• The orientation of movement

• The speed of movement

How do some fitness trackers measure heart rate?

• Using a GPS

• Using a barometer

• Using optical scanners

• Using a thermometer

What is the role of the microprocessor in a fitness tracker?

• To charge the battery

• To process and transmit data

• To sense movement

• To display the time

What is one benefit of regularly elevating your heart rate?

• Improved vision

• Better digestion

• Stronger bones

• Healthy blood pressure

What activity do Kamri and Cody do to test the fitness tracker?

• Running a marathon

• Swimming

• Testing at a gym

• Cycling

What does Kamri suggest viewers do at the end of the video?

• Subscribe to a fitness magazine

• Watch more episodes of 'How Things Work'

• Buy a new fitness tracker

• Join a gym

What humorous comment does Kamri make about Cody at the end?

• He should eat healthier

• He should run more

• He needs a new fitness tracker

• He needs a shower