This question doesn't fit in any other category, so I figured I'd post in here.
I know T-Nation is about strength, and not endurance training, but I figured there'd be some knowledgeable individuals who could chime in (and if you're a T-Nation contributor, feel free to chime in as well).
Here's the scoop:
I went jogging today, and whenever I do my endurance training, I measure my heart rate 15 minutes into activity, immediately after finishing activity, and after 1 minute of recovery.
Here's what happened: at the 15-minute mark, my heart rate was 183. At the 30 minute mark (the end), my heart rate was 192. My question is why was I able to maintain such a high heart rate for so long? Wasn't I in the anaerobic zone at this point, well above my VO2max and well past the lactate threshold? Shouldn't I have been able to maintain that pace for only 90-120 seconds, tops?
I'm 21 years old, so my age-predicted maximum heart rate is 199. 183 and 192 bpm represent 92% and 97% of my HRmax, respectively. Now, I know that this is just a predictive formula, and a standard deviation is about 15 bpm. So let's say that my max heart rate is actually 214. In that case, 183 and 192 bpm would represent 85% and 90% of my max. Still above my VO2max and lactate threshold.
Does anyone have any possible explanations? The only one I can think of is that my maximal heart rate is more than one standard deviation above the mean, which would place 183 and 192 below my VO2max.