When Greg got me the Garmin 410, one of the reasons he picked that model was because it was compatible with a heart rate monitor and he wanted me to have that option. It took me over a year to use it, but I have to admit it was neat getting the data feedback!
Garmin has a video tutorial section on their website that had my heart rate monitor on and connected to my watch in under 5 minutes.
The strap needs to touch your skin on your chest, so I just tucked it under the strap of my sports bra where it stayed in place easily the entire run. I knew it was there, but I didn’t really notice it, and it bothered me a lot less than my water supply strapped to my waist (which is starting to bounce more than it used to, I wonder if I used to wear it differently?).
I thought it would be fun to wear it on a long run and get 10 miles of data.
Before I looked at the numbers, I had to figure out what they meant. Active.com has a Target Heart Rate calculator. These calculators all use a standard formula, where you subtract your age from 220 to get a maximum heartrate. According to WebMD, “the American College of Sports Medicine recommends a target heart rate while exercising of 50% – 85% of your maximum heart rate”. My maximum heart rate (220 – 30) is 190. That means my range is 95 beats per minute – 161 beats per minute. Where you shoot for in that range depends on how active you are, with the highest cardiovascular benefits at the top end of the range.
I didn’t know what to expect for a reading. It was a long run, so I knew I’d be exerting less continuous effort than if I were only running a few miles. (Here’s a link from Runner’s World about determining the correct heart rate percentage for different runs.) Connecting my Garmin to upload the heart rate data, I was a little apprehensive. What number did I even want to see? If I were able to run 10 miles at my normal long run pace in the lower part of my target range, it’d mean that I could probably be working harder. That’d be great, because I’d love to be faster… and yet, I feel like I’m working plenty hard already! On the other hand, if I were working at the upper end of my target range, I’d feel validated that I’m pushing hard enough on my long runs, but also have the buzz-kill of realizing that I’m not going to magically drop a minute per mile off my long run pace “just because I wasn’t putting in the effort I could be”.
Mentally, I know I’ve been working hard. But what would the numbers say? And how much does it really matter?
Above is the chart read-out of my splits. Areas with less than 1 mile splits are where I stopped to take a GU, or, in one case, where a motorist pulled over and asked me directions. (Unfortunately, I was almost 5 miles from my house and had no idea where she was going, so I had to stop my audiobook and use my smartphone to help her!)
In 10 miles, over 1 hour and 43 minutes, my heart rate averaged 166. My highest heart rate was 178. That means I was working above the recommended heart rate window…. for an hour and forty three minutes. See? I knew I was working hard.
The neat part? When I stopped the watch to GU, or give directions, or even for a stoplight or street crossing, my Garmin might not have recorded a split to show that I was taking a break, but my heart rate chart showed it clearly.
The dips in the heart rate are pauses in my running. If you look at the chart, you can see all the dips where it gets down to the 140s. It even dips down to 133 after that long conversation with the lost car driver. Even if I’m not diligently recording every pause for a stop light, street crossing, or GU anymore, my heart rate lowered because I took a break, and then increased again as I started running. The neat part? Even though I feel like I’m cheating every time I rest at a stop light, my heart rate is still well within the range for healthy cardiovascular activity. In fact, if you believe this chart, I should be pushing LESS hard when I’m running, especially for a long run. It’s kind of crazy to average above the high end of the recommended range for that long of a run! I guess it shows that I am a “very active person” to quote WebMD, because I felt comfortable.
My heart rate was high, but I passed the “sentence” test for effort. I was working hard, but when I ran off the sidewalk to go around two gentlemen who were talking at mile 7, and they called out to me that they would have moved, I was able to shout back three whole sentences at them that they were very sweet, but it was totally fine, and I was happy to go around. (That’s literally what I said. Not just thanks. And I didn’t sound like I was going to die.)
So, what does this mean? Depends who you ask. Runner’s World has actually taken down their heart rate calculator, with an explanation that the formula I cited above just isn’t accurate enough for all individuals to be helpful. You can read more in detail here. Another neat article from Runner’s World about heart rates is this one: “Finding Your Perfect Heart Rate Training Zone.” It points out that runners often don’t run slow enough on recovery runs, and therefore can’t run as many miles a week as they otherwise might be able to. Since one of my major problems is that I seem to run all my runs at a very similar pace, I think wearing a heart rate monitor and going out for a few “easy miles” is a great idea. I could try to keep it relaxed, and see if I can run some miles in a lower range in order to add an extra day of running to my week without compromising the quality of my key workouts.
In general, I think these numbers show that I am definitely improving. I wasn’t hooked up to a heart rate monitor a year ago, but I can tell you for sure that I could not have maintained a high heart rate for an hour and forty five minute run…. because the longest I’d ever run was 33 minutes.
So maybe my pace feels slow when I compare myself to other runners who are running around 20 miles a week. That’s ok, because I’m working hard, and I AM improving. To be able to keep my heart rate that high for that long means I’m kicking some butt out there, and I’m proud of that.
Will I run with a heart rate monitor a lot? Probably not. But I think it’s a neat tool to validate the impression I had of my own running, which is that I was working at an appropriate level of effort. Yes, I was above the recommended range… but I was also able to get three sentences out, and keep going. I even picked up the pace for the last part because I wanted to get home. Two things are clear: I was working hard, because my heart rate was high, and I was not working too hard, because I was doing fine.
I like knowing that. I’ll remember it next time I feel like I should be running faster than I am because of how much I’ve been running. I have proof that I’m working hard 🙂 Not that I needed it… but does it ever hurt to have some numbers for validation?
Next up – I’ll try to wear it sometime for a tempo run, and a recovery run.
I don’t plan to wear the monitor regularly, but I enjoyed doing a run with it to learn a little bit more about whether I was putting in enough effort on my long runs, or had some room for improvement. From a cardiovascular standpoint, I’m doing great 🙂
Anyone else use heart rate monitors in their training?