![]() The Charge 5 is swim-proof, although don't expect it to measure anything accurately when you're underwater. ![]() This feature is similar to the Strain Score in the Whoop 4.0 and is based on heart rate variability. It can also score your body's ability to recover/train through its Daily Readiness Score. ![]() It has a built-in GPS, an optical heart rate sensor, an AMOLED touchscreen and a comfortable band that doesn't make you all itchy after an hour or so.Īs well as tracking heart rate 24/7, the Charge 5 can monitor sleep, blood oxygen levels (SpO2), skin temperature, breathing rate and Active Zone Minutes. The Fitbit Charge 5 is a capable fitness tracker.
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