Biciclette Bianchi said:
The last running race that I did (before major knee surgery) was a ten miler, and I hit an HR of 192 in the kick to the finish. During training, I would routinely hit the upper 180s on hill repeat days. On the bike, the max that I've ever hit is 177 (during a race). During workouts, low to mid 170s is all that I can manage.
The exertion that limits me is the pain in my legs... I just can't hold on through the muscular fatigue long enough to hit really high heart rates.
Dave
Since you mentioned triathlons, I assume you've done say a 20K time trial (in training or race). If you do that and stand up for the last 30 seconds kicking for all you're worth, what is your heart rate? I find that I am maybe 3-5 beats lower in that scenario than in a running race.
I definitely wasn't suggesting that you didn't know how to put out effort
It's just that 15 1 minute repeats is not by any stretch going near your maximum pace. One thing that has helped me with speed changes in races (though I'm still not very good at it) is to get going maybe 1-2 miles an hour faster than an easy spin, then put it in a pretty high gear, stand up and kick all out for 15-20 seconds. Most of that time is spent getting up to speed. At first I would do one, let myself completely recover, then do one again. I'd repeat a bunch of times during a ride The last couple times before our season-ending race last week I tried doing the workout but after blowing myself out for 15-20 seconds, I tried to sit down and keep a time trial kind of speed for a minute then try another 15 second acceleration. The second acceleration was ragged, but I was able to do them. After each set of two, I took complete recovery. I don't check my HR on these kinds of workouts - I hardly ever wear a monitor any more in fact.
The race itself went better than previous races. I was however in over my head and unable to move up much from the back of the pack, so eventually the repeated accelerations from 15 around the turns up to 28 got to me and I was dropped. But I had a far easier time with the accelerations than in previous races.
Sorry for rambling a bit, basically I'd say you could consider trying really short accelerations. That may or may not address your HR issue, but I think most runners who switch to cycling can benefit from it. And it does tend to make your legs better able to handle the rigors of cycling if they tend to go to gel when you put on the power.