Heart Rate Variability - Farid Medleg

[@martymartinez5709]

Im back 6 years later!!! Good stuff. Kubios has been upgraded. Maybe you need to do a new video! :) Thanks again.

[@deepakdass5286]

I have been using your presentation for the past 8 years Thanks!

[@davidtolle9533]

This man made one video and then left lol! If by chance you read this. Thank you for creating this video. Very in depth

[@samarjsingh]

Farid, this presentation was given about 4 years ago. I have just recently woken to the potential of HRV. I tried Kubios but had difficulty understanding it and moved to RHRV. Now I am liable to move back thanks to this presentation. I also found your explanation of the frequency domain very good, and of the non linear even better. All in all a great piece of work.

[@dubadoc]

I am a biofeedback-trained physician with special interest in HRV work and I find your presentation quite excellent. It would be great to see you create other presentations that take this subject further.

[@sdseka29]

Hi Farid, The video is a clear explanatory of HRV analysis and the KUBIOS software. Your narration is very good and tries to make the complex analysis to relatively a simple one. I am planning on a manuscript and your video helped me lot to understand. I have been analyzing my lab rat subjects with various treatment for HRV using KUBIOS. Great work by the Software developers, that too for free. One more thing I noticed is, you have excellently played with screen capture for the presentation. That looks great too. Thanks for your effort. sdsekar, UAE University

[@FaridMedleg]

Thanks for the feedback, it's always appreciated. Have you found anything unusual while analyzing non-human subjects? Also, what are some of the resources you're using to guide you?

[@GeorgeRon]

Stellar presentation and much to your credit, a video organized within the short attention spans of most people. Keep it up!

[@FaridMedleg]

Hi All, Thanks for the great responses. I didn`t expect this would get so many views! I`d like to make this a forum for some discussion as my knowledge on it is quite rudimentary and I am interested in using this further. I have enough experience with cardiac patients so my knowledge might be of some use there, but I definitely welcome opinions and references to other sources should you have any. I will definitely get back to these tomorrow night!

[@fmbccarmo]

Thank you for sharing your knowledgement and for clarify Kubios' secrets. :-)

[@MrPlafont]

Farid, thanks for the video. Very clear and complements some of the other sources out there.

[@FortLauderdaleAcu]

Thank you for this wonderful explanation. In addition to athletic training I can imagine the many creative uses in stress management and biofeedback research this technology can be used in.

[@saad49]

Oneof the greatest presentaion, informative, great communicator...Loved it

[@adrianaflorestrespalacios5065]

Thanks for such a nice presentation about how to use Kubios, I really enjoyed it.

[@natiannatu]

Thank you for the vid. I found the explanation on where frequencies come from to be simple yet amazing.

[@FaridMedleg]

Thank you! As I told someone else, I'm by no means an expert on any of this, just someone interested and learning. If you have resources or your own experiences to share, please do!

[@ARpensieve]

I'm so pleased to find this video clip! Thanks!!

[@drcarmstead]

You presentation is excellent for training my lab students! THANKS!

[@wilfrid2087]

Excellent video. Clear xplanations, concise, brisk, interesting, clrisp software display. Slight concern at the start that it was going to be just audio. Thank you. Needless to say I am going to look at your other videos.

[@mpmyersphd]

Excellent video. Thank you so much for sharing this. I am using HRV to look at facilitating coach and mentor interactions and your video helped tremendously.

[@FaridMedleg]

A software as in-depth as the one I used (Kubios HRV) comes with an extensive user manual. Read it carefully, this one in particular was quite good. Also, the companies that manufacture the software are all still quite small. I've communicated with two so far and both have answered in a timely manner and were extremely polite and helpful. There goes my wish of not being long-winded...

[@martymartinez5709]

Very well done. Thank you! I learned a ton from this and this is exactly what I wanted to know.

[@Clemsesful]

Thanks for this excellent introduction!

[@hsap2000]

Excellent presentation! Many thanks for this.

[@RobLunn1]

Excellent tutorial! Thanks!

[@aldocosta7567]

Excellent! Thanks. Please share the link of the study you mention at the end, or post the name an author so I will search it.

[@tuongminhquoc]

Thank you sir!

[@achz82]

Hi Farid. This video is by far the best on explaining to beginner/novice(us) on HRV. You;ve mention SDNN(mean) as the best calculation of HRV. So i've search around journals looking at SDNN of healthy vs sportsmen vs sickly .. and...i am getting weird numbers back. so, may i ask you professor/dr farid?? 1. your video shows SDNN of 69(supine) and 63 (seating) 2. this paper "Kluttig et al, (2010). Association of health behaviour with heart rate variability: a population-based study" showed sport-index SDNN = 25.8 ??? are they all sick? 3. this paper "Dietrich et al., (2006). Heart rate variability in an ageing population and its association with lifestyle and cardiovascular risk factors: results of the SAPALDIA study. 1showed men SDNN = 138.2 ??? are they super human??/ tx @alfred

[@victorellingsen2378]

This is really helpful! I'm starting to learn about HRV (applications in psychology, actually) and am having such a hard time finding any resources that don't assume a pretty extensive prior knowledge of the subject. This video answered several basic questions I had. Do you have recommendations for other resources?

[@krzaczek2403]

Great tutorial , very useful !

[@SpiritusMundiKid]

Thank you so much for this video! VERY VERY informative :D I realise that this is a pretty old video and that you may not reply, but I'm going to ask anyway, hopefully someone out there can help me with this! I am struggling to understand exactly what is the time domain measure RMSSD? I am doing a research study and using RMSSD as a measure of parasympathetic influence on the heart...however I am not sure what exactly it is measuring in the RR interval data?Also, how would I explain RMSSD to a lay person? Thanks!

[@FaridMedleg]

I'm still here! No time to look into this and give a proper response, but I'll get back to it soon. Thanks for watching! Farid

[@silviegrote1551]

Farid Medleg Hi Farid, Would you be able to share the publication citation you used in your presentation?

[@jbaric95]

Very very informative. Most explanations on the topic of HRV don't delve into the relevance of the data collected. However, to take it one step further, why not also have a video detailing the relevance of the a sympathetic versus parasympathetic dominance? You touched upon it, however, an in-depth explanation would be very effective. Again, thanks man :)

[@jaswinderkaur7651]

Very nicely explained

[@Grognax]

Hi Farid, thanks for the vid. Studies show that high resting HRV is a marker of good health, and that the Valsalva maneuver is a great way to increase acute HRV (see "valsalva ratio"). Therefore, would practicing the Valsalva maneuver be better than slow breathing at around 4-7 breaths per minute (like it is often recommended) if the goal is an increased resting HRV?

[@225rip]

I use the Elite system with Polar H10. I am 68 years and swim, bike, run 4-5 days a week. I have been taking daily reading for over 500 days. Could you please give me general target numbers I should be around for PNN50, SDNN, RMSSD and LF/HF. Thank you for a great explanation, I took the HRV course by Elite and have a general understanding but need to continue my education.

[@FaridMedleg]

@Sonja: That's fantastic news. Not nearly enough literature on the subject. Have you found any good studies or reviews you would like to share? @Grognax: I'm actually in the dark on the precise electrophysiology behind a high (good?) HRV. Something like the Valsalva maneuver is a vagal technique one can use to acutely stimulate parasympathetic tone. I'm just not sure about whether the acute changes in HRV (with repeated Valsalva episodes) actually CHANGE longer term HRV. If a reduced HRV is a sign of autonomic "fatigue", would that evidence of fatigue not simply return after you stopped performing a Vasalva? I would seem to think so if the source of that low HRV is pathological. As for slow breathing, the sinus arrhythmia it induces might certainly increase HRV, but that doesn't eliminate the cause of low HRV. If, for example, you find a low HRV due to over training, practicing slow breathing doesn't eliminate the over training. I believe HRV is the means to uncover underlying conditions, not the condition itself. @soot: I'm actually unfamiliar with athletic thresholds for HRV. I'm only now getting back into the topic. I imagine HRV doesn't change too much from supine to standing. HR may increase slightly but the overall autonomic tone should note. You may perhaps be able to detect smaller changes while supine. @jbaric: The literature seems to be moving backwards in that you don't need to fully understand the basic physiology to use HRV properly. The literature was superficial at first and I believe only now are delving into the discussions on para/sympathetic details. @Casper: I would think a longer sample would be better. Try to be as still as possible as well. While HRV is not measuring HR directly, if the the rate is changing as you move, the equation might not take a change of posture into account and a change in rate could affect HRV. What % change do you get when you change the sample window?

[@AGILISFPV]

Wish there was an update on this.

[@francescazoppas792]

Thank you so much, it was really helpful!

[@sootedninjas]

thanks for the great info. I'm using emwave2 and can import/export RR data. I use emwave2 for my Tai Chi practice and I do some intense training too. Like high intensity weight lifting for strength and condition. How can I used Kubios to determine the I have recovered from a previous intense training ? What data should I be looking for ? Do I need to established any baseline ? Is there any literature out there that can assist me in determining training recoverability ?

[@ijohnny.]

Is an HRV test taken with an ECG, using different algos? What is the source of the waves--an input from an ECG machine? Thanks for this truly excellent presentation.

[@FaridMedleg]

...cont'd I'm not great with the electronics/computing part, but here goes: There are recording devices out there that will take care of this for you, I just don't know if they give you access to the raw data. (I believe there's even a smartphone app available). If you're "cooking from scratch", just make sure that whatever collection software you have is spitting out data points that your analysis software understands (one column for time points, another for voltage for example).

[@sootedninjas]

Also, If you do know the answer Would it better to do this lying down or standing up in the context of determining intense training recovery ? Thanks in advance.

[@aminsinichi]

Super!

[@MassiMilad]

Awesome dude!!!!

[@jkara7843]

clear, well explained thanks

[@luisgil6064]

Thanks. Kudos.

[@na9oooooooor]

thank you

[@sarahmcmahon8923]

thank you for this

[@ijohnny.]

Thank you thank you! I really appreciate it. Just read Heartmath Solution (and the Starch Solution, in keeping with "solutions") and I want to play around with HRV. HRV is also mentioned much in Thought Field Therapy by Roger Callahan.

[@UDrich1985]

I hope one of knowledgable folks here can answer a simple question for me. I have been researching HRV and especially how HF power reflects parasympathetic tone. It is theorized that slowed breathing 6 sec inhale 6 sec exhale will enhance the parasympathetic nervous system by increase vagal tone and decrease systolic blood pressure in hypertensive individuals. So why does HF power REDUCE in individuals when the paced breath compare to normal breathing? Until I tested this out I always thought that HF power would increase in response to an acute bout of slow breathing? any help is appreciated

[@samarjsingh]

+UDrich1985 Hi, I have been taking readings regularly for about 4 months now several times a day. Once a day with normal breathing and then using coherent breathing. My experience is that you have to get the coherent breathing cycle that is right for you as an individual. When you have the right sort of coherent breathing - and mins is about a 20 second cycle - there is a massive increase in HF.

[@poooocfull]

where can i find old kubios version for MATLAB 2014a?

[@haroldibouanga8635]

Very good presentation. Please, can you tell me where i can download this software? I search on google, but, the official kubios hrv web site isn't available. Thanks.

[@inemgirl01]

Harold Ibouanga I noticed that too but I did download. Could you find a way around it? I did.

[@FaridMedleg]

So as long as your device that records heart rate is storing its data in one of these formats, it should work. You don't need a 12-lead ECG to do this, that would be overkill. Theoretically, one electrode should do the trick so long as its placement allows the recording device to distinguish every heartbeat.

[@FaridMedleg]

Hey John, sorry for the late response; somehow this was flagged as spam and I didn't see it! I'll try to get at your question backwards without being long-winded: This particular software accepts multiple file formats: .matlab, .xls, .txt. (And it doesn't have to be a live feed. You can load a saved file rather than hooking your subject up directly to Kubios). cont'd...

[@efbon3]

thank you. im about to start a study on stress related HRV changes. Although i have just basic knowledge of HRV, thanks to your video, i have more understanding. Is a 2 Lead ECG enough to measure HRV so that it will not be a problem measuring females?

[@FaridMedleg]

Yes. As far as I know, every derivative measure comes from calculations using the R-wave. As long as your lead has a prominent R-wave, it shouldn't be a problem, though I would like to hear if anyone has any opinions on this. If you have the time, test out different individual leads to see which yields the clearest results.

[@megansloan25]

Hello Farid, - I'm using a measuring tool from the HeartMath Institute for HRV and I'm trying to upload them through KUBIOS software however its seems to only upload a single reading while each subject has 3 recordings, one prior to intervention, one post, and a last 24 hrs later. Would you know how I might be able to access the 'sub-files' and upload them individually? I am either getting only one of the readings or its giving me an average of all 3. Any help would be appreciated. Thanks

[@sshagiwal446]

Hey Megan, you asked this question a year ago. I am in the same situation and am writing to ask whether you ever received an answer to your question. If yes, could you kindly help me with resolving this issue now? Cheers, Sara

[@davidtolle9533]

@@sshagiwal446 the files of heartmath are not in the format that this program can read, as far as i can tell. Someone could correct me

[@tatewinters5565]

VLF - No one wants to touch this...likely because its so controversal. From what I gathered it is a signal that determines if you are diseased in some way. An uncomfortable subject

[@ericvsylva1610]

where can i find old kubios version for MATLAB 2011a?