HOW DO FITBITS WORK

Fitbits fall into the category of an application of science that has an effect on human health
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WHATS FITBITS ABOUT

• Fitbit motivates you to reach your health and fitness goals by tracking your activity, exercise, sleep, weight and more

HOW DOES FITBITS COUNT STEPS

• Fit devices use a 3-axis accelerometer to understand your motion
• An accelerometer is a device that turns movement when attached to body

HOW DOES THE FIT BITS CHECK YOUR HEART RATE

• When your heart beats, your capillaries expand and contract based on blood volume changes. PurePulse LEDs (light-emitting diodes) on your Fitbit device reflect onto the skin to detect blood volume changes, and finely-tuned algorithms are applied to measure heart rate automatically and continuously. The heart-rate icon you see on the display tells you if you're in 1 of 3 heart-rate zones.

HOW DO FITBITS CALCULATE DISTANCE

• Fitbit devices calculate distance by multiplying your walking steps by your walking stride length and multiplying your running steps by your running stride length. It estimate your stride lengths using your height and sex.

HOW FITBITS CALCULATE HOW MANY CALORIES YOU BURN A DAY

• Fitbit devices estimate your calorie burn based on your age, sex, height, and weight. If your device measures heart rate, the calorie burn estimate also takes heart rate into account. Note that the value you see on your Fitbit device when you wake up in the morning is your estimated calorie burn for the day so far. You still burn calories even if you are sedentary or sleeping.

HOW DOES A FITBIT TRACK SLEEP

• Fitbit’s are set to track your sleep automatically.Fitbits algorithms assume sleep has begun when you haven’t moved in more than an hour. In ‘normal’ mode, Fitbit will only track major movements such as rolling over. In ‘sensitive’ mode, Fitbit will log almost all movements as ‘restless’ time.

TYPES OF FITBITS

• There are a lot of types of fitbits like flex 2,Alta,blaze and a lot more

WHERE I FOUND ALL MY INFORMATION

• I found most of my research on fitbits on the internet and I also found a book in the library and also found research in that