<p>When I first got a heart rate monitor over a year ago, I came across an interesting study:</p>
<p><a href=“http://depts.washington.edu/cardweb/fellowship/NuclearCardiology/BasicNuc_StressArticles/Heart%20Rate%20recovery%20NEJM%201999.pdf[/url]”>http://depts.washington.edu/cardweb/fellowship/NuclearCardiology/BasicNuc_StressArticles/Heart%20Rate%20recovery%20NEJM%201999.pdf</a></p>
<p>This was a massive study of some 2500 men and women, average age 57 years old. They had them all do a treadmill stress test to reach maximum heart rate and then measured how much their heart rate fell from that peak in 60 seconds after slowing to a 1.5 mph 2.5% grade recovery pace.</p>
<p>This gave them a very comprehensive look at what the norms of this population are in terms of heart rate recovery. </p>
<p>The median recovery was 17 beats per minute reduction in 60 seconds.
The worst 25% quartile had 12 bpm or worse recovery rates.
The best 25% quartile had 23 bpm or better recovery rates.
The top 20% quintile had 30 bpm or better recovery rates.</p>
<p>Here’s the kicker. They followed all of these subject for six years and found that this single measure had a strong correlation with dying. 19% of the people in the bottom 25% (recovery rates of 12 or worse) had died in the six years following the stress test. Ony 5% of the people with recovery rates above 12 bpm had died. Thus, being in the bottom quartile meant a four times greater risk of dying within six years. Even after they corrected for various risk factors, the risk correlation was still double.</p>
<p>When I first measured my 60 second recovery rate at the top of the big hill, panting like a dog, a year ago, it was 15 bpm. The good news is that I wasn’t in the imminent death category, which considering I had smoked for 38 years and was an ol’ fat guy, wasn’t as bad as it could have been. The bad news is that I was well below average. Not good.</p>
<p>One of the features of my new heart rate software is that it will automatically calculate my best heart rate recovery from each workout. I’ve had some really good tests over the past ten days, both with hard Airdyne intervals and with these damn walk/jog intervals that are consistently hitting 100% heart rate. My recovery rate intervals for walk/jog or Airdyne intervals of the past 10 days are:</p>
<p>28
30
31
30
27
28</p>
<p>In other words, a year of fat loss and exercise has increased my measured performance from below average, near the bottom quartile to solidly in the top quartile, if not the top quintile. That’ll put a smile on an ol’ (formerly) fat guy’s face! :)</p>