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Heart Rate different during strength vs cardio workouts

I've conducted a number of tests to check and it is clear that heart rate is recorded or calculated differently during Strength workouts compared to Cardio workouts.

Doing the exact same exercises on cardio, I get an average 155 BPM , whereas during strength around 118 BPM. I have tested this multiple times.

Anyone else have a similar experience or an explanation ?

thanks

0 Former Member over 5 years ago

This is from Garmin:

Additionally, HR is calculated differently for each activity. Use the activity app that matches the activity being done. For example, using the Elliptical app while running outdoors could result in incorrect HR being recorded.

https://support.garmin.com/en-US/?faq=xQwjQjzUew4BF1GYcusE59&productID=621922&searchQuery=optical%20heart%20rate&tab=topics

Why they use different calculations for each activity is probably the better question I'd like Garmin to comment on.

0 TomaszD over 5 years ago in reply to Former Member

I guess this is true for OHR - as I've noticed OHR is using supplementary sensors to estimate HR - like accelerometer or gyro sensor, which usage pattern depends on activity type.

0 tess over 5 years ago in reply to TomaszD

https://forums.garmin.com/outdoor-recreation/outdoor-recreation/f/instinct/164175/question-sportmode-hiking-trail-run-mountain-climb-mountaineering

0 Former Member over 4 years ago

Cardio heart rate is crap. I also have tested it extensively and get almost double heart beat compared to other activities for the same workout. I have contacted Garmin and got no where. Wipe cardio, it stuffs up V02, calories etc.