We are pleased to announce that as of March 4, 2025, an updated Rich Text Editor has been introduced in the MyFitnessPal Community. To learn more about the changes, please click here. We look forward to sharing this new feature with you!

Running: High heart rate during first 10 minutes

rrowdiness
rrowdiness Posts: 119 Member
edited November 2024 in Fitness and Exercise
Hey all,

I recently invested in a HRM (Garmin 910 xt package) and have been tracking zones as part of training for a marathon later in the year.

I've noticed that the first couple of km of any given run, my heart rate is measured in Z4-5, at the high 160s and 170s, then it drops back down into Z2-3 suddenly. It's very consistent across sessions - in 8 out the past 10 there has been a big spike at the outset bumping along at the top of Z4.

Pace, incline etc are consistent across the first couple km and I don't go out hard. Aside from this first period, I would not get up into Z5 unless doing intervals.

Any ideas?
This discussion has been closed.

Categories