General Discussion Triathlon Talk » Rising Heart Rate Rss Feed  
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2013-04-15 10:05 PM

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Subject: Rising Heart Rate

Is this anything to be concerned with? During the course of running or biking on the treadmill or trainer, my heart rate will always continue to rise after about 5 minutes until I stop. This is with keeping a relatively consistent pace.

For example, today I ran 10k in about 50 minutes. With a short 2 min warmup my hr was about 150. Within the first 5 minutes, my hr jumped to 164, then settled at about 151. By 10 minutes, same pace, my rate was 154, 15 minutes 157, 25 minutes 162, 40 minutes 168 and at 10k/50 minutes about 170. I felt I could have run another mile or a little more at this pace - 7:56 pace.

As far back as I've had a hr monitor (3 years) I've always been like this. Im in my 4th year running and 3rd in triathlon. Done hm and Olympic tri. For longer runs, my hr starts lower after an initial jump, but while maintaining the same pace, my hr eventually creeps up to around 170 near the end.

Is this anything unusual?



2013-04-16 8:09 AM
in reply to: #4701936

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Champion
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Subject: RE: Rising Heart Rate
I believe you're seeing what's called "cardiac drift", and is quite normal. I know there's been a lot of talk about it on "that other site". Might be worth checking there.
2013-04-16 4:36 PM
in reply to: #4701936

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Subject: RE: Rising Heart Rate
Pete1234 - 2013-04-15 10:05 PM

Is this anything to be concerned with? During the course of running or biking on the treadmill or trainer, my heart rate will always continue to rise after about 5 minutes until I stop. This is with keeping a relatively consistent pace.

For example, today I ran 10k in about 50 minutes. With a short 2 min warmup my hr was about 150. Within the first 5 minutes, my hr jumped to 164, then settled at about 151. By 10 minutes, same pace, my rate was 154, 15 minutes 157, 25 minutes 162, 40 minutes 168 and at 10k/50 minutes about 170. I felt I could have run another mile or a little more at this pace - 7:56 pace.

As far back as I've had a hr monitor (3 years) I've always been like this. Im in my 4th year running and 3rd in triathlon. Done hm and Olympic tri. For longer runs, my hr starts lower after an initial jump, but while maintaining the same pace, my hr eventually creeps up to around 170 near the end.

Is this anything unusual?



So what you are saying is that your HR spikes pretty high when you first start running, then it drops? I have had that happen to me many times and so has a client of mine. I don't think it is anything to be concerned about. Keep in mind too, that it might just be the HR monitor strap freaking out, but if you see it consistently every run, then it probably isn't.

Otherwise, it is common for your HR to rise while your pace stays the same, the longer you run. It is called cardiac drift (what the other responder said). I wouldn't say it is unusual.

2013-04-16 4:47 PM
in reply to: #4701936


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Subject: RE: Rising Heart Rate
For me the shorter the warm up period the more pronounced the spike in heart rate in the beginning. To avoid it I usually warm up for 10-15 minutes and do that by HR, building up slowly to the effort level of the workout. Not sure though what the exacr impact of proper wu is on cardiac drift, which is normal.
2013-04-16 4:48 PM
in reply to: #4703121

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Subject: RE: Rising Heart Rate

Read a lot about HR training over the years.  This is typical.  Lots of things affect HR.  Temp and dehydration are a couple.  When temp goes up, so does H.  R picks up a little with dehydration.  Both are typical with endurance workouts that start getting that long. So yeah, cardiac drift.

There are books from Burke, Friel, Maffetone, and Janssen that I found interesting.  The one by Janssen the most (called Training Lactate Pulse-Rate).  All of these are a little older, but still pretty good.  I was pointed to some more recent studies, but forgot the references.

2013-04-16 9:36 PM
in reply to: #4701936

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Master
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Subject: RE: Rising Heart Rate
Your situation seems completely normal to me. But do whatever YOU think you need to do.


2013-04-16 11:46 PM
in reply to: #4701936

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Subject: RE: Rising Heart Rate
Pete1234 - 2013-04-15 11:05 PM

Is this anything to be concerned with? During the course of running or biking on the treadmill or trainer, my heart rate will always continue to rise after about 5 minutes until I stop. This is with keeping a relatively consistent pace.

For example, today I ran 10k in about 50 minutes. With a short 2 min warmup my hr was about 150. Within the first 5 minutes, my hr jumped to 164, then settled at about 151. By 10 minutes, same pace, my rate was 154, 15 minutes 157, 25 minutes 162, 40 minutes 168 and at 10k/50 minutes about 170. I felt I could have run another mile or a little more at this pace - 7:56 pace.

As far back as I've had a hr monitor (3 years) I've always been like this. Im in my 4th year running and 3rd in triathlon. Done hm and Olympic tri. For longer runs, my hr starts lower after an initial jump, but while maintaining the same pace, my hr eventually creeps up to around 170 near the end.

Is this anything unusual?

Cardiac drift is very normal, *especially* when training indoors on a trainer or treadmill. Unless you bring a fan, you have very little air movement to cool you like you would with actual forward movement outdoors. It may not seem like much, especially at the run speeds vs bike speeds, but you really have nothing cooling you...far less convection for the sweat forming on your skin. It all leads up to two things: (1) gradual HR increase, and (2) a realization that training outdoors is more fun (although I do lots of treadmill and trainer times - I'm a wimp in the north who hates being cold)!!!
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