During an aerobic exercise class, I typically bounce around in different zones. On the Fitbit screen, I see my heart rate and other interesting information, specifically my heart rate zone and the time I’ve been in the zone. The optical heart-rate sensor detects a range of 30-220 BPM.įitbit makes it so much easier than finding my pulse at my wrist or neck. Then your device calculates how many times your heart beats per minute (BPM). To determine your heart rate, the optical heart-rate sensor in your Fitbit device flashes its green LEDs hundreds of times per second and uses light-sensitive photodiodes to detect these volume changes in the capillaries above your wrist. When your heart beats, your capillaries expand and contract based on blood volume changes. Both are math problems I like to avoid-and I can with Fitbit. For maximum heart rate, we subtracted our age from 220. As a class, we fumbled through finding our pulse, counting beats, and multiplying by four to find our heart rate. In not nearly enough time, an instructor explained the room’s new heart rate wall poster and what it meant. My first experience with heart rate, maximum heart rate, and heart rate zones was at a cycling class at the YMCA. Having all this great information at my fingertips wasn’t always easy. A quick glance at my Fitbit and a few swipes immediately shows me my heart rate, plus lots more useful data. I check my heart rate when I get up, during a spin class, yoga, a dog walk, traffic backups, and stressful meetings. I admit that I am slightly obsessed with monitoring my heart rate.
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