Yup. It&#x27;s total crap. You&#x27;re not going to push your heart rate so high you damage yourself, at least not a normal&#x2F;sane person. If it was a serious risk, we&#x27;d all be wearing heart rate straps 24x7 with alarms sent to remind us to sit down when our HR gets into dangerous territory.<p>I have a Suunto Ambit (GPS, HR strap, altimeter, barometer, etc) and a Fitbit Surge HR I got for Christmas. Sometimes both work, sometimes neither works. You use it for what it is. Typically when they both get a good signal, they&#x27;re reporting the same figures.<p>Let me guess, the claimant wasn&#x27;t wearing the Fitbit the recommended 2-3&quot; above her wrist bone at the time.