How Do Fitness Trackers Measure Heart Rate? | Photoplethysmography Explained

How do fitness watches and smartwatches like the Apple Watch , Fitbit and Biostrap measure heart rate and heart rate variability?
How Smartwatches measure heart rate?
Why does Apple Watch and Fitbit have a green light on the back?
what are the green lights on the back of an apple watch ?

Please watch the full video, it’s a Heart Rate Monitor Review video.

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Fitness tracker like the Apple Watch, Fitbit and Biostrap measure heart rate ( heart rate monitor ) and other health data using a technology called Photoplethysmograhy or PPG.

Photoplethysmography works via an optical sensor in your watch that shoots either a red or green light onto the surface of your skin.

When this light reaches your blood vessels, some of this light is reflected back to a photodetector on your watch. The intensity of light reflected back captures a waveform of the amount of blood in your blood vessel.

Who Use What:
Apple Watch green light and
Fitbit blaze green light PPG
but Biostrap red light PPG to measure clinically accurate advanced biometrics like heart rate variability and oxygen saturation.

If you have any questions feel free to drop a comment below!

Dr. Yo
ECA Wellness

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How do a Smartwatch Work | Heart Rate Monitor Review | How Does Fitbit Work

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Relevant Videos :

1. Biostrap Review : Best Fitness Tracker

2. What is VO2 Max ?

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How do a Smartwatch Work | Heart Rate Monitor Review | How Does Fitbit Work
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Can I prevent a heart attack? Dr. David Rutlen, director of the division of cardiovascular medicine at UAMS, answers the question and discusses heart risk factors and what you can do to decrease your risk of having a heart attack. To schedule an appointment, please visit uamshealth.com/appointment.

Dr. Michael E. Silverman is a cardiologist with Cardiovascular Specialists of Central Maryland and has privileges at Howard County General Hospital in Columbia, Maryland. In this video, Dr. Silverman describes the symptoms of a heart attack, who is most at risk, and what you can do to keep your heart healthy.

For more information about the cardiac and vascular services available at Howard County General Hospital, Johns Hopkins Medicine, please visit http://www.hcgh.org/heart.

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http://www.nucleushealth.com/ – This 3D medical animation shows the coronary vessels in the heart and the different ways they may become blocked. The symptoms of acute coronary syndrome (ACS) are depicted. The animation finishes up with common treatments for acute coronary syndrome and heart attack.

ANH13113
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View full lesson: http://ed.ted.com/lessons/what-happens-during-a-heart-attack-krishna-sudhir

Approximately seven million people around the world die from heart attacks every year. And cardiovascular disease, which causes heart attacks and other problems like strokes, is the world’s leading killer. So what causes a heart attack? Krishna Sudhir examines the leading causes and treatments of this deadly disease.

Lesson by Krishna Sudhir, animation by Chadwick Whitehead.
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This animation features the heart and circulatory system and how they work. For more information, visit:
► http://www.mayoclinic.com/health/heart-disease/DS01120/?mc_id=youtube

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From a mythological curse that stops the breath once asleep, to a face disfiguring disease that attacks children, these are 15 diseases with no cure. We take a look through 15 horrible diseases that have no cure.
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Kayla lives with the world’s most painful disease: Complex Regional Painful Syndrome (CRPS). Watch as she details how the life-changing disease came about, and her quest to find a cure. #BodyBizarre

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About a quarter of deaths worldwide–many of them children–are caused by infectious organisms. The World Health Organization reports that new infectious diseases are continuing to emerge and familiar ones are appearing in new locations around the globe. What You Need to Know About Infectious Disease provides an overview of infectious disease, drawing on reports of the Institute of Medicine.

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This animation describes the cause, symptoms, and factors in the development of Crohn’s disease, a type of inflammatory bowel disease (IBD).
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