A.M. I did my long run today because of the kids' track meet the next day, except I kept it medium long because I had to work immediately afterwards, and I knew I was not going to get adequate recovery if I made it full 20. So I ran 8 out uphill in about 59 minutes, and then 8 back down in 46:20- 5:47.5 average. I struggled in the last 2 miles, and especially in the last mile. It did not feel like fuel, I think it was the heart. In fact, for the last two weeks I've felt like I've had a hole in my heart. Well, I do not think there is really a hole, otherwise I would be dead, or at least would not be able to run at all. It is probably just the thinning out of the muscle and it is probably very minor, but to me it is not because all of a sudden my pace drops by 10 seconds per mile terrain adjusted in the last two miles of an 8 mile tempo at the end of a long run, so I call it "a hole".
I have actually considered the idea of training runners to recognize what is going on with their heart by performing the tests at the times they felt there was something different. The idea is this - a trained runner with some HRM experience knows his HR without having to measure it. He knows his pace by feel. With some training he could be taught to identify his stride rate. By the same token he could be trained to identify his lactate concentration and blood glucose level by feel. What else? How about the thickness of the heart muscle in different parts of his heart? Probably a good number of important parameters. Why is this important? A runner with some scientific training paying close attention to his body overtime would be able to formulate a hypothesis about some process that a scientist would never think of because the runner has 24x7 access to a multitude of sensors and can processes their input subconsciously - a luxury not available to a scientist even in the best equipped lab. Then the scientist could test it and prove it in a lab.
I wrote to a couple of researchers about it. They agreed with me that it was a good idea, but as far as I know it never progressed beyond the status of a good idea. I suppose if I really wanted to push this beyond it I could get a degree in cardiology, get my hands on the equipment, and start doing it. Or maybe there is a better way - I need to become good friends with a cardiologist that has access to the equipment, is a bit of an unconventional thinker, and is interested in exercise. If you know anybody, give them a reference to this post.
Benjamin did 6, Jenny 4, Julia 2, Jacob 1, Joseph 2, William 1.