High heart rate during slow run (Read 588 times)

I ran 12km a couple of days ago and because I knew I was tired already, I wanted to run at an aerobic level, rather than anaerobic. (My understanding of this is that running at aerobic pace will burn fat stores, rather than zap glycogen stores even when tired, but correct me if I'm wrong). No matter what pace I ran, my heart rate would not drop below 150-155. My average HR when running on a good day is probably about 155-160 if I'm running fast and can sit at 140bpm if I'm running slowly. Should I be worried about my HR sitting so high even when (trying to) run slow? My resting HR is pretty normal.

If your body has not recovered, your HR will be high. Warmer temps will raise it also. But don't worry, rest or go slower.

Ah, the dangers of wearing a HRM. If you didn't feel dizzy or anything, I wouldn't worry about it. If you hadn't been wearing a strap (I assume you were?), you wouldn't even know it had happened! Any number of things could cause that. And it's really not a big difference from your normal range anyway. Run on!

Exactly my thoughts.