Thursday, March 17, 2011

Cardiac Drift

The human heart feels things the eyes cannot see, and knows what the mind cannot understand - Robert Valett
One way to measure fitness is to examine cardiac drift. I'll loosely define this as the tendency of the heart rate to increase as the length of the exercise session increases. If your heart rate doesn't change much over 10 miles then you're in great shape. If it steadily climbs to your maximum after only 5 miles then you may be able to improve your marathon performance by increasing your stamina.

The key to an accurate measurement of cardiac drift are these keys:
1) A sufficient warm-up
2) Consistency during the run (pace, hydration, temperature, elevation, etc.)
3) Distance of the test run

Today I ran 8 miles on the treadmill while I watched the first games of March Madness. I'll count my first two miles as a warm-up -- enough time to let my heart rate fall into a steady state. I kept the pace constant (7:41), the gym temperature didn't vary (although it was warm enough to leave me soaking wet with sweat). I kept the treadmill on a 1% incline the whole time. I did not drink anything over the entire hour run, which may negatively skew my results. Failure to replenish your fluids results in a higher heart rate in large part because the blood becomes more viscous, making it harder to pump. The heart increases the rate in order to maintain an adequate oxygen supply to the muscles.

As far as point 3 goes, I ran six miles after my warm-up. I've read studies that your drift should be under x% for distances of y miles in order to be in shape for races of z distance. I can't remember any of those variables, but I would think that a 6 miles cardiac drift test would be a good indicator of half marathon fitness.

This is how it played out, with each line representing an average heart rate for that mile:
7:41 pace throughout, 1% incline
124 BMP
132
135
139
141
143
144
145

I'm not really sure what to do with this, but for simplicity sake I'll subtract the average of mile 3-5 from the average of mile 6-8 to get about 6 beats per minute. if I take that number and divide it by the average of mile 3-8 then I get a 4% cardiac drift. If I factor in my resting heart rate (about 45?) then the drift is about 6%.

(144-138)/(141.167 - 45) = 5.67%

The thing is, I don't know if 4% is good, or if 6% is bad. And if I say that my warm up was four miles instead, then those numbers go down to 2% and 2.5%. And I also don't know the effect of not drinking during the run.

I guess the answer is not so much the absolute number so much as how these numbers change when/if I ever do this same exact test again.

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So unlike Pharroh, but an effective corruptor which was responsible for the 40 years of warmongering under Joshua. This caused another host of problems to befall the Jewsish people as well.

Even as peasant farmers we could be lulled::Good weather, bountiful harvests, etc. This is what old-world preachers were good for.
This stereotypical preacher had classic preaching styles:::Loud, damnation-fueled teachings. Contrast to today, preachers who are lulling the Damned into cruise control. The old-world style was important to snap people out of complacency. Unfortunately, in today's enviornment people consider this style insulting, and they lose a precious message designed for the favored of yesterday.

I speak of how The Beast has changed the country and the world with Californication. Whereas 20 years ago the young women used to ridicule homosexuality now they find it acceptable. Come the next generation the norm may be experimentation.
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I have repeatedly illustrated the frequency of "reverse positioning". This is yet another.

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The Japanese Earthquake/Tsunami of 3/11/11 was actuslly a good sign for the people. Alarming because it came decades after their most recent admitted atrocities during WWII, at least they will experience corrective punishment, whereas the United States won't be as lucky.
Russia too enjoyed corrective punishment for the 1980 invasion of Afghanistan.
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Yes, the clone host fake politicians have been planning for this for decades. Ronald Reagan turned a $1 trillion Federal debt into $6 trillion at the end of his Administration. Much like W in Iraq, this served to terminate the favor of a group of people. Reagan just didn't have to do it with violence as W did, but he did do it against white people, which says something.
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The interesting thing about Cardiac Drift is that if you have tried it you will never skip this event

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There has to be a maximum point for results referring to cardiac drift. One can only train and improve to a point. For some that level or point is much higher than for others.

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