Abnormal run training heart rates

(Dave) #21

As @siobhan will vouch — I have stupid amounts of salt. Averaging close to 10 grams a day (not a typo). And it took a lot of trial and error to get to understanding that’s exactly what I needed. I supplement close to one gram each of magnesium and potassium, but it’s the salt that matters the most. If I’m away from that average for too long I’ll start getting leg cramps and other issues.

(Candy Lind) #22

TEN! I need to buy stock in … what brand of salt do you use?? :rofl:

(Omar) #23

I did not read all the replies in the thread.

my blood pressure improved.
my resting pulse rate and activity pulse rate both went up by 10 to 15 pulses per minute.

my activity pulse rate used to be 80 to 85

now it is 95 to 105 pulse per minute.

my resting pulse rate which is more accurate went from 50 to 65 pulse per minute

quite an increase

(Phoebe Bishop) #24

So glad I found this! I started keto a month ago and have recently returned to running after a meniscus tear. My heart rate shot up dramatically and I couldn’t get it back down. I was about 20 pts higher on my heart rate than typical for a 5 mile run. I was freaking out a bit as I have a half marathon this weekend. I will try the salt thing and see if that helps. What about exogenous ketone supplements? Would that help mid-run at all? Thanks!

(Mellinda) #25

How are you doing now? Months later.

I have read you post and it is so recognizable. Cannot get my hart rate down, and my pace is much lower than before Keto. I’m wondering when this gets back to normal.

(Tobias Månsson) #26

Another long time keto runner adding to the pool of people experiencimg these issues. My low effort HR is at 145-150, and pacing at 160, which is high for my age. Any incline and I’m up to 170-180 bpm. At the same time I’ve lost speed, and my place is now slower. I don’t care about pace since I’m not racing, but the heart rate is bothering me.

I’ve been running on keto for almost 1,5 years now, and it’s only been getting marginally better. Seems this is the way the body works on keto…

Salt and Electrolytes help, and I always bring salted water to long runs. Pre-workout carbs also helps, but not much more than MCT-oil. So I’m sticking to the oil. :slight_smile:


It doesn’t get back to normal that is the conclusion I have come to. I have tried everything and have only one solution for this. Throw away the HR monitor, run by feel and it is as though nothing has changed. One must accept that HR is higher on a Ketogenic diet, and running with a HR monitor just brings in the “worry” factor that something is wrong. Nothing is wrong. Run by feel, or as I do run with a power meter (Stryd), because a Watt always tells the truth, as opposed to HR which can lie though its teeth!


See the reply I just wrote to Melb7 above.

Salted water is good for the long runs. I would kick the pre-workout carbs though, they really don’t help in my opinion. MCT-oil on the other hand helps me a lot when I take it before a run.


High HR is normal with a keto diet when running, just accept it. Best to run with HR and only run by feel. MCT oil before a run helps.

(Tobias Månsson) #30

I usually run by feel as well, and my average HR is actually lower when I don’t look at the watch while running. :slight_smile:

I can run while breathing through my nose (to me that’s low effort) and that’s when my HR is around 150.

I soon figured out I need salts, but I’m still experimenting with what and when to eat. Now I’m trying supplements, and with all this the effect keeps changing. :stuck_out_tongue: Seems like this is a tricky subject!


I heard a podcast with Noakes, he said exactly this. Detractors take the higher bpm as a sign of reduced efficiency - he said there’s no evidence of this. You just need more oxygen. That’s it.

I’ve experienced it as well, but when I look at training zones it really just shifted up. What used to be a race heart rate is now sustainable tempo.



Found the podcast:

The comments about efficiency and heart rate are at 38:25 (but the whole thing is pretty much worth the listen). It’s a cycling podcast but he’s talking generally about keto and athletic performance.


(Tor Christian Stamnes) #33

I’m also an athlet. I’m training for ultraruns and do mostly low intensity workouts. >80%. I’m having as good as exactly the same HR data as @Kiwiness and experiencing the same in my runs regards of HR. I’m very glad I found this post because this issue has concerned me alot. I’m feeling great, but my resting HR and low intensity Zone has elevated by 10-15 strokes.

After listening to Timothy Noakes and as he explains that fat-burning acquires more O2 when beeing used. But doesnt this affect the areobic capasity in the end? Or does the higher amount of energi per fat-molecule/ketone weigh up for the less energic CHO? That in I mean that for (very simplyfied) every FAT-molecule to make energi to the stride you have to burn two CHO-molecules to make the same power and then you have used the same or maybe more amounts of O2?

(Candy Lind) #34

I’m hoping @daveketo, @Kiwiness or some of the others who previously posted here will pick it back up for @Tor_Christian_Stamne and maybe get some new blood, as well. There are a lot of good suggestions early on in the thread, so I encourage you to read all of it. And welcome to the forums!

(Tor Christian Stamnes) #35

Also I learned that during HIIT (which I did last evening) levels of cortisol is highly elevated especially for us on lchf/keto for the purpose of trigging glucagon and gluconeogenesis at severe rate due to rapid replenish the high use of blodglucose and glycogen stores.

As of this I’m today feeling alot more stressed out with harder and faster pounding heart than before on a higher CHO diet. So really i don’t think doing a 100% strict keto diet while exercising high intensity is that good thinking that cortisol is a hormone that activates stressful processes. Though the levels of cortisol should be lowered quite fast after exercise I don’t think it does that when on a strict keto diet and therefore it is important to carb up after exercises like HIIT.

What is your thoughts about this?
@Kiwiness @DaveKeto

(Tor Christian Stamnes) #36

Btw. I got my strips today and my Lifestyle Neo showed 3,3mmol/L blood glucose and 3,4 Bhb just before dinner today 5pm. Last meal was 11am.
That’s a GKI <1. Guess that’s not a condition you want to do HIIT I or? But I hope that’s a sign that I’m well adapted as long as I feel very good besides the raised HR