Showing posts with label zone. Show all posts
Showing posts with label zone. Show all posts

Monday, October 1, 2012

Heart rate spikes and my HR monitor

Mystery spikes at the beginning of my runs
I started using my heart rate monitor again in late August and it's helped me understand how much (or how little) work I'm putting into a run. Instead of looking at my Garmin and checking my pace for that moment, I now display my heart rate and adjust my effort depending on what I see. I've learned that my default pace happens when I'm running in the zone 2 range, far below what I would have thought.

Now, when I see that my heart rate is still in the "easy" zone, I'll pick up the pace to cross the threshold to the next level. I aim to reach zone 5 by the time I finish most of my runs and I usually get there.

I was looking at the readings from yesterday's run and noticed that my heart rate was holding close to 100% of Max through the first three minutes. From there it dropped precipitously down to 76% for no apparent reason. I had seen this happen before, my first few minutes of the Cow Harbor 10K show a spike to 100% of Max before dropping to 80% at the five minute point.

In the case of Cow Harbor, I was pumped up for the race and had consumed a 2nd Surge gel with caffeine right before the start. In contrast, yesterday's run was low key, with no gels or caffeine to influence my physiology. In both cases I felt no different between the high and normal readings. Since it doesn't correlate to my condition, I'm thinking the reason is completely benign.

In both cases the humidity was low and I had not wet the HRM sensor before I linked it to the Garmin. Without moisture from sweat, the readings were probably unreliable. After a few minutes of running (and sweating) they dropped to an expected level. I'll test this theory tomorrow by ensuring the contacts on the HRM are wet before I start my run. I'm pretty sure I'll see a smoother curve along the timeline.

Sunday, May 10, 2009

A weekend of joyful running


I've really enjoyed running this weekend and I'll give much of the credit to my new shoes. The pleasure of running pain-free combined with the feeling of moving efficiently has often eluded me over the last couple of months. I am appreciating the Brooks although I do wish that the tongue extended higher past the throat to provide more padding when the laces are tightened. Other than that they are really great and they have quickly dispatched my leg soreness issues. I thought I might redeploy my Nikes as my office running shoes so I tried them again with the after market insoles I had recently purchased. Wearing the Brooks over the last seven days gave me an opportunity to compare the two pairs and the new insoles in the Nikes exaggerated the pronation and made me realize why I needed a stability shoe. I went back to the original insoles and that stabilized the Nikes enough to use them for another activity: a Mothers Day soccer game with my wife and kids.

As for running, I did more miles over a (two day) weekend than ever before. On top of yesterday's near six I ran 4.6 miles this morning. Like yesterday, I did this distance feeling very strong and I wasn't especially tired by the end. As I ran I worked on my form and stride and played with my pace a bit. I did the first quarter mile along a measured distance and noticed that the Garmin was tracking about 6% short. I knew I would need to Gmap my route against my total time to get my true pace but at least I knew that whatever the Garmin was reporting I had run faster and farther. I mixed up my route and covered some streets I haven't taken in a while. The whole run felt great and, for the second time this weekend, I reached the "zone" that I had heard of and read about but had never personally experienced. Where was the noble suffering that I had come to expect? Was this some great breakthrough that has propelled me from the status of beginner to something more? Had the Emerging Runner finally emerged?

Well, not exactly.

I do think that I've made progress and I'm a far better runner than I was nine months ago but much of this weekend's experience had to do with using the right gear and focusing more on duration and less on speed. My pace for today's run was 9:17 which surprised me because I thought I was moving along at a better clip. But I now know through experience that I can integrate speed into my distance runs every few minutes and gain 20 or more seconds per mile. In the meantime I'll be happy to have run 10.5 miles over two days and loved every minute of it.
 

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