General
You are looking at: Home : General

Q+A: Can a low heart rate lead to any problems?

Our experts answer real-life questions


Posted: 15 August 2004
by Paul Thompson

Q I have an unusually low resting heart rate – with beats per minute in the mid-30s – and my doctor is a bit concerned about it. What is the normal range of resting heart rates for runners? And are there any problems associated with a low resting heart rate?

A First, because endurance athletes have strong hearts, they generally have low heart rates. As an analogy, consider a bricklayer lifting bricks. If his arm muscles are strong from lifting lots of bricks, he can move 10 bricks with each lift rather than just two or three. Similarly, if your heart muscle is strong thanks to running, it has a higher stroke volume, which means that it can pump more blood with each beat than an untrained heart. It can also pump the same amount of blood in a minute using fewer beats. The average resting heart rate of endurance athletes is around 50-60 beats per minute. I’ve seen one report, though, of a healthy athlete whose resting pulse was only 25 beats per minute.

Doctors who are familiar with athletes only get worried – and follow up accordingly – when a resting heart rate is lower than 30. But even this can be completely normal (and usually is) if the athlete is otherwise healthy. The slow heart rate indicates a strong heart, but this alone does not make you a better runner. There are too many other factors involved in running performance.

Are there any problems associated with your low heart rate? Perhaps one. It does make you more vulnerable to anything that reduces the blood flow back to the heart, such as coughing or choking on food. This occurs because the reduced blood flow causes the heart to slow down even more, to allow more time for blood to enter the heart.

And that can set off an involuntary nervous response that leads to fainting. Apart from this, provided that you have no other symptoms or complaints, your resting pulse should not concern you, or your doctor, unduly.

Paul Thompson, cardiologist


Previous article
The Union Movement
Next article
Athens From The Crowd - Part 1: Paula

heart rate monitor, with pace, heart rate, HRM, rest
TwitterStumbleUponFacebookDiggRedditGoogle


Discuss this article

I have a resting heart rate of 60 bpm. 

And I freeze my bum off sleeping outdoors. One of my professors says its because of my low bpm. . .

 Zero degree bag in 30 degree temp and still freezing   


Posted: 21/11/2010 at 23:25

I have a resting heart rate of 60 bpm. 

And I freeze my bum off sleeping outdoors. One of my professors says its because of my low bpm. . .

 Zero degree bag in 30 degree temp and still freezing   


Posted: 21/11/2010 at 23:26

Nah, mines mid 40s and I don't really feel the cold.
Women always get cold if they venture further than 5 feet from a heat source. That's why they love kitchens so much

That's assuming it's a proper zero degree bag, and not something bought for $5 from walmart.
Posted: 22/11/2010 at 09:33

.
Posted: 22/11/2010 at 09:33

I measured mine at 51 the other day (it's probably closer to 54 though) and i'm constantly too hot. I haven't even fully closed my windows yet never mind turning the heating on.


Posted: 22/11/2010 at 11:21

Ian - naughty boy

My RHR is usually in the low 50s have seen it lower RHR is an indicator of fitness if it gets lower (to an extent) its a sign you are getting fitter.


Posted: 22/11/2010 at 11:27

It's said that Seb Coe's RHR was around 36 at his peak. It's not uncommon to hear of runners with RHRs in the mid 30s. Mine's in the low 40s. I've always had cold extremities, and getting my RHR down by 30 bpm hasn't made any real difference. What is your professor's speciality?

When I told a friend who's a GP in an under-privileged area how low my RHR was, she told me it wasn't normal and something was wrong. Having discussed it with various medical professionals, particularly ones who work out, they concluded that, coming from the area she does, unfortunately, she probably doesn't see too many people who are that fit. This is just an assumption they made btw - not my judgement. I'm not getting political and suggesting people in run-down areas are unfit. 

BTW - Women tend to have higher HRs than men. Try a Google for 'athlet's heart'. Wikipedia's down at the 'mo, otherwise I'd provide a link. The bottom line is that, all that running gives you a bigger heart muscle, in the same way a lifter has bigger biceps. Because it's bigger, it doesn't need to beat so much when you're loafing out - as I am now, instead of working (bad me).

http://merckmanuals.com/professional/sec07/ch082/ch082c.html
Posted: 22/11/2010 at 20:28

Oh yeah - an indicator of fitness is your 1-minute recovery rate. Go run up a hill for 3-4 minutes, as fast as you can so you hit max. HR. Take your HR, rest and relax for 1-minute and then measure it. If it's over 30 beats you're pretty fit. Elite athletes can go as high as 90. I'd hazard a guess and say most good club runners are probably around 50-60. (this is men btw - may be different for girls)
Posted: 22/11/2010 at 20:35


>
What would worry the doctors is whether the pulse is irregular and if their are symptoms associated (blackouts, chest pain, palpitations etc.). In the absence of both, nothing to worry about.
Posted: 22/11/2010 at 21:50

My RHR is 40 or 39. I've seen my HR as low as 24. It's never been considered a problem by anyone - GP or consults in hosp. Sitting here at the pc it's usually around 43-44

I thought 60 was normal not low?

I'm always cold, I'm female and I don't know what 'kitchen' is other than the room where I keep my bike pump and cycling gear.


Posted: 22/11/2010 at 23:43

If you feel the cold before other people it could be due to a very low body fat percentage, which is common amongst runners. So don't worry and just wrap up.
Posted: 25/11/2010 at 06:59

mine is very low ranging from about 30 when fit to 48 as I am now (fat and not fit). Only trouble I had was when suffering bad  anxiety and my RHR went up to a massive 65 and doc thought I was exaggerating how anxious I was because 65 in some peops normal-lol
Posted: 25/11/2010 at 07:09

The only correlation I can think of between low RHR and cold intolerance is hypothyroidism- both can be symtoms of that- generally low metabolic rate, so weight gain, skin/ hair changes, mental slowness too- just Google it if you think that might be you. Otherwise, a RHR is very normal- "average" is said to be 72, but tremendous individual variation.

Get a new sleeping bag!


Posted: 27/11/2010 at 12:48

I think most of the "risks" of having a low heart rate are largely associated with individuals that have a low RHR despite not being very fit. Athlete's heart and such are generally considered to be benign conditions which whilst raising a few eyebrows when visiting the docs/hospital etc. don't generally cause any problems. 60 is pretty normal
Posted: 29/11/2010 at 21:32

genetics also has something to do with it. My mum has a low RHR too.
Posted: 29/11/2010 at 21:35

Talkback: Q+A: Can a low heart rate lead to any problems?

First Name:
Last Name:
Nickname:
Email:
Security Image:
Enter the code shown:

I agree to the site's Terms and Conditions & Code of Conduct:


Smart Coach
Free, fully-personalized training plans, designed to suit your racing goals and your lifestyle.