More or less to amuse myself I wore my heart rate monitor. As it turned out it wasn't so much amusing as it was a learning experience ...you just never know!
My goal was to run 40K at a 6:00 pace. First off the positive spikes are bad data . The first hour I was in the high 120's. I took a break and ate a Cliff Bar a little over and hour in. As you can see my heart rate quickly plunged to 100 bpm. The second hour I observed the HR in the low 130s . There was a couple of brief stops for water and then a little over 2 hours it was part of my 2nd Cliff bar. Didnt stop as long but the HR didnt plunge quite the same way it did at rest after 10K. 2-3 hours saw a steady increase to the high 130s and some times breaking 140 bpm. After 3 hours I had done 3 S Caps , 3 Bottles of Water and 2 Cliff Bars and had logged about 28km. I was feeling good and moving well in the 4th hour but the HR was always in the low 140s and it was beginning to fatigue me. Briefly stopped around 3:30 to crack a can of Coke and talked to Dan for a bit. Just before 4 the 4 hour mark I finished off the Coke logging around 37km. The last 25 minutes I watched the HRM and kept the HR in the high 130's. Through 40K I was feeling less fatigued ready to continue on but my goal was to do a 42.2km run so I pulled the plug art 40.3km and walked a 2K cool down. HR recovered to the 110 bpm range about 10 bpm higher then a walk after a 1-2 hour Run.
No doubt I was a little light on calories "hitting the wall" at around 35km. It actually wasnt a walll more or less a speed bump. It was either slow down a bit or consume more calories. Only going as far as a 42.2 I decided to slow down watching the HR. If I was going longer it would have been more calories!
Always learning after all these years!
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