Forerunner 245's pulse ox inaccurate? 90% is not normal for someone who doesn't smoke and who's not out of breath. Plus most of the time they struggle to get a reading. What's
Garmin Forerunner 255 GPS Smartwatch, Battery Upto 14 Days, Advanced Insights, HeartRate Variability & Advanced Sleep Score, SPO2 & Stress Monitoring, Performance Condition with Blue Band : Amazon.in: Electronics