Differences in Heart Rate
Wednesday, August 19, 2009
I've become well-acquainted with my heart rate at different levels of exertion while running. I've read that different activities elevate the heart rate to different levels, but I can't seem to wrap my head around that fact, even though I see it to be true.
I narrowed down my lactate threshold while running at around 158-160 bpm. When I get to that point, I'm working pretty hard, but still can sustain that level of effort for 20 minutes or so.
On the other hand, I did a spin class yesterday, and I start to feel the agony when my heart rate breaks 150 and can only sustain that for a few minutes. It's a similar story on the row machine, where anything over 150 is only for a minute or two during an interval before I have to slow down to recover.
It's almost as if my heart rate zones shift downward for cycling and rowing from what they are when running. Swimming is probably even lower; though I don't wear a heart rate monitor, when I finish a sprint and am near exhaustion, I'll take a quick 15-second pulse count and my heart rate will be barely over 140. That might have something to do with the prone position of the exercise and the heat-dissipation nature of the water.
I don't know, but it is obvious that heart rate training zones are different for different activities. Just another variable to make things more confusing.