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Garmin 405cx - variable calorie count+low hrm values

Former Member over 10 years ago

My Garmin 405CX is giving lower cal/km values than usual. I checked at least 60 historic records aleatory since I got the 405CX (2012) and the average value is 97,23 cal/km versus 47,46 cal/km today. Also, the HRM has showed lowest values than real, considering the effort done during the training. I appreciate your diagnosis and remediation. Regards.

0 JSRUNNER_ over 10 years ago

Hi is this just a one-off issue or has it been gradually happening - it would be useful to see the actual activity.

If your training is being effective then you would expect the calorie consumption per mile to reduce.

I suspect the culprit is the HRM as the older Garmin straps seem to become very unreliable after time.

Can you give us examples of the HRM track from recent activities vs a couple of older activities?