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2. Apple Watch - Wikipedia

   en.wikipedia.org/wiki/Apple_Watch

   The back of all Apple Watches are equipped with a Heart Rate Monitor, which projects infrared and green light from light-emitting diodes (LEDs) onto the user's skin and photodiodes measure the varying amount of light reflected. Because blood absorbs green light and reflects red light, the amounts of each type of reflected light are compared to ...

3. Workouts (Apple) - Wikipedia

   en.wikipedia.org/wiki/Workouts_(Apple)

   During a workout, the app will display the time elapsed since recording of the chosen activity began, the user's current heart rate, and the active and total kilojoules burned during the workout. Other metrics can vary depending on the type of activity, such as displaying the total altitude of a cycling workout or the total laps of a swimming ...

4. Pulse watch - Wikipedia

   en.wikipedia.org/wiki/Pulse_Watch

   There are also devices which use similar technologies to monitor heart rate from the ear, forearm and chest, using a chest strap. [2] All of which still use similar mechanisms to provide unobstructed biometric data for individuals. One study compared the use of a pulse watch device and a forearm device in detecting heart rate during physical ...

5. Heart rate - Wikipedia

   en.wikipedia.org/wiki/Heart_rate

   A medical monitoring device displaying a normal human heart rate. Heart rate is the frequency of the heartbeat measured by the number of contractions of the heart per minute (beats per minute, or bpm). The heart rate varies according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide.

6. Fitness (Apple) - Wikipedia

   en.wikipedia.org/wiki/Fitness_(Apple)

   All workouts recorded through the Workouts app on the Apple Watch are viewable through the 'Summary' tab of the Fitness app and include relevant metrics and HealthKit data, such as heart rate, depending on the type of exercise. For outdoor activities, summaries also include weather conditions at the time of the workout and a map that outlines ...

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   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

8. Heart rate monitor - Wikipedia

   en.wikipedia.org/wiki/Heart_rate_monitor

   A heart rate monitor (HRM) is a personal monitoring device that allows one to measure/display heart rate in real time or record the heart rate for later study. It is largely used to gather heart rate data while performing various types of physical exercise. Measuring electrical heart information is referred to as electrocardiography (ECG or EKG).

9. Is It Safe to Use Expired Vitamins? The Truth About Vitamin ...

   www.aol.com/vitamins-expire-nutritionists-weigh...

   24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in ... plus how to store your vitamins for optimal use and the safety risks of consuming vitamins when they ...