What could cause this? Very often after some time my heart rate goes down when running or walking (without stopping or going slower). After that moment it doesn't come back to the correct heart rate. Making tighter or loosening doesn't help either.
What could cause this? Very often after some time my heart rate goes down when running or walking (without stopping or going slower). After that moment it doesn't come back to the correct heart rate. Making tighter or loosening doesn't help either.
And this morning again, just 4 km of walking. I really don't understand why the heart rate line drops....
