MK3i show 200BPM on my 10km run

I ran on a Treadmill 10.25km in 49min (10km in 48min).

During the run the BPM showed 200, and when I check it on the Treadmill the BPM was 157 (which is the normal i usually have during my run).

Any thoughts why it was like that on my Garmin MK3i?

Below are 3 charts of my last runs -

12 Km

8 Km

10 Km

Top Replies

trux over 1 year ago +3

Shally said:
Any thoughts why it was like that on my Garmin MK3i?

Cadence lock.

Common problem especially at heavy watches bouncing more on the wrist, and in winter when the blood circulation in the extremities…
Shally over 1 year ago +2

I did a stronger tightening on today's run, and reading was much better.

12 Km in 57.30 min

All Replies

0 seilogramp over 1 year ago

Moved thread to the Descent Mk3 forum. Was in the Index BPM forum, which is for the Garmin blood pressure monitor.

0 trux over 1 year ago

Shally said:
Any thoughts why it was like that on my Garmin MK3i?

Cadence lock.

Common problem especially at heavy watches bouncing more on the wrist, and in winter when the blood circulation in the extremities is reduced due to the cold.

The Heart Rate Sensor on My Garmin Watch Is Not Accurate | Garmin Customer Support

0 odzamir over 1 year ago

For better a nd more accurate reading of the HR use the bellt and not the sensor of the watch

0 Shally over 1 year ago

I did a stronger tightening on today's run, and reading was much better.

12 Km in 57.30 min