tag:blogger.com,1999:blog-5699699130631903971.post103213780662606366..comments2024-02-27T06:34:30.335-08:00Comments on Muscle Oxygen Training: DFA a1 and exercise intensity FAQBJRMDhttp://www.blogger.com/profile/03840322337577591292noreply@blogger.comBlogger87125tag:blogger.com,1999:blog-5699699130631903971.post-40640180914945173532023-07-21T11:11:48.410-07:002023-07-21T11:11:48.410-07:00Thanks for your comments and thoughts, let’s go ov...Thanks for your comments and thoughts, let’s go over the list:<br />It would only scan with 130Hz but would be meaningless – Not so – we will get the waveform shape (maybe you have some sort of conduction issue or bundle block) and Kubios usually does quite well with the 130 Hz sample rate in my experience (I've learned a lot since I stated 130 Hz is too low). The app developer can’t help you – the 130 Hz is locked by the device.<br />Much too high values of 'a1' for biking for my understanding (male, 46, not very fit, a1=0.75=155bpm=210Watt) – There are folks who (for some reason) do not drop early. We are seeing that in more and more tests, and the HR differential can be 20 bpm. Having said that, it does not appear that the HRVT2 is affected in the same way (a1 of 0.5). I would suggest using a modified RPE/talk test to confirm or refute the 0.75 threshold – if you can hold a conversation at 155 bpm, the HRVT is close, but it could be much lower. As far as the drop with running, we still have little in the way of a reason why that happens, except for the change in cardiac vector from bounce screwing us the R timing.<br />would additional noise between the R-R Peaks (maybe due to Heart valve defect 2 instead of 3) influence the a1 value but the artifact number would be still 0% due to the good R-peaks. – Yes, exactly. You may have no artifact (either noise or arrythmia) but a conduction defect from whatever reason can mess up the RR timing. But, that usually presents as a premature a1 drop (not a late one). I would be happy to take a look at a ramp done with the H10 and ECG logger – just send me a link (use my email address from any of the papers).<br />Bottom line – looking at the ECG is priceless for cases that are difficult to figure out.<br />BJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-4610695640881824412023-07-20T10:48:34.728-07:002023-07-20T10:48:34.728-07:00Another thing I would be interested in to exclude ...Another thing I would be interested in to exclude this as a problem.<br />If the R-R Peaks are clear and strong (high R-peaks and little S-Peaks achieved to sensor displacement of 1 inch) then the a1 values should be fine and correct (= artifcat 0%) - am I right?<br /> Or would additional noise between the R-R Peaks (maybe due to Heart valve defect 2 instead of 3) influence the a1 value but the artifact number would be still 0% due to the good R-peaks.Boerskehttps://www.blogger.com/profile/17753494206056873487noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-22244551446524373332023-07-20T10:38:01.019-07:002023-07-20T10:38:01.019-07:00Hi, together.
Since quite a bit I am developing a...Hi, together. <br />Since quite a bit I am developing an Triathlon Training APP and I want to implement the DFA-a1 analysing method with my team for practical use as I see all the benefits of practical usage as you are describing them.<br /> I wanted to test this quite new threshold detection method before being sure to implement it in a practical way, I have to say that I am stumbling over multiple problems that are described here. But I cannot beliefe that this might be the end of this journey. <br />So I started to read and studying all your findings and some podcasts from the last months and years of you Bruce and I am trying to find the reason for this strange situation I am facing because somehow the pitfalls do not fit together and are not aligned as what I understand from what you are explaining in all the blogs here. (read detail below)<br />This last comment made me now writing this comment to you, because my next attempt would have been to trace my ECG with the ECGRecorder APP running on the iphone. It would only scan with 130Hz but would be meaningless, if you say that I might face problems not with the sensor but rather would have biological problems with my heart, that only can be investigated with an APP running on a higher frequence. (Info: I am in contact with the developer of this tracer APP and asked if that could be changed.)<br /><br />Details to my case:<br />I am experiencing exactly the same problems as reported here by 'spookymuggs' and 'Ruva'. Much too high values of 'a1' for biking for my understanding (male, 46, not very fit, a1=0.75=155bpm=210Watt), the cross trainer workout (elliptical) does not even drop below 0.75 (like with spookymuggs) with HR=146 bpm. I did the ellipical workout after I have seen my run data and I guess I am one of the guys with a 'runner syndrom' (drop of a1 when starting running) with the results being all over the place when it comes to a1=0.75 (125-150 bmp). Why bike results are higher then for runs is also a mystery as my artifact number is always below 1% having a H10 HRM. Should it not be just the opposite - bike HR should be a bit lower then the run HR? <br />I moved the sensor already an 1 inch or so to the left as described in another blog of you Bruce, and I also used compresse clothing etc. but the results seem not to be better. I am analysing the data with AIEndurance, Runalyze and I am even in contact with the developers there. Would you still recommend their algorithm even for APC problems if I would have such? I exactly have those APC drops sometimes like described by you and that is why I wanted to go down the road with the ECG tracer data.<br /><br />Haven written all the above I am also wondering if there is an update in that area about 'recording ECG signal with 130Hz' in detail to make sure that I do not suffer from any biological problems that make my a1 values and therefor me as a tester useless. <br /><br />Food for thoughts - Have you ever investigated in electrostatic charging due to sport cloth that might influence the HRM signal?<br /><br />Happy to hear or read from you. <br />Regards<br />PhilBoerskehttps://www.blogger.com/profile/17753494206056873487noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-737659987175807212023-07-20T09:59:51.751-07:002023-07-20T09:59:51.751-07:00This comment has been removed by the author.Boerskehttps://www.blogger.com/profile/17753494206056873487noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-61844158057783462542023-02-16T06:11:16.938-08:002023-02-16T06:11:16.938-08:00Thank you. There are many ways to look for your f...Thank you. There are many ways to look for your first threshold and it's always difficult to say which is best. I'm assuming you do not have power (since you suggest HR). The second set of numbers seems reasonable for a ballpark look - and yes, when you reach .75, that's about the limit of zone 1. As I mentioned elsewhere, there can be some bounce in the numbers so repeating this a few times should give you some more accuracy. We have used HR as the sole measure in some of our studies, including this one that just came out (https://www.mdpi.com/1424-8220/23/4/1973/htm#) - good luckBJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-16792639962047289052023-02-16T04:43:20.686-08:002023-02-16T04:43:20.686-08:00Love this blog!
I'm struggling to figure out ...Love this blog!<br /><br />I'm struggling to figure out a ramp for myself for my cross trainer and bike. Would this result in an optimal identification of my aerobic zone? My max HR is 200bpm. I think my aerobic zone is 145-155bpm<br /><br /><br />Warm Up 10 mins @ 125bpm.<br />3 Mins @ 135bpm<br />3 Mins @ 145bpm<br />3 Mins @ 155bpm<br />3 Mins @ 160 bpm<br />3 Mins @ 165bpm<br />3 Mins @ 175bpm<br /><br />What about when using it for real time adjustment on a real work out? Should you just do like:<br /><br />4 mins at 140bpm<br />4 mins at 150bpm<br />4 mins at 160 bpm<br />4 mins at 170bpm<br /><br />And see when I hit 0.75?<br /><br />Many thanks!Dushhttps://www.blogger.com/profile/13397270954359088331noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-84520394443293540652022-03-18T15:03:01.776-07:002022-03-18T15:03:01.776-07:00Premium https://www.kubios.com/respiratory-rate-a...Premium https://www.kubios.com/respiratory-rate-algorithm-validation/BJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-44117379781525200042022-03-18T14:55:21.863-07:002022-03-18T14:55:21.863-07:00The Frontier x device records ECG 24/7 as a hear m...The Frontier x device records ECG 24/7 as a hear monitor strap. I asked the company to add RR Sending signal to be added to device in order to work with HRV Logger and other HRV appsAndy Mhttps://www.blogger.com/profile/05553609675601338087noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-48209352262763331552022-03-18T14:29:15.478-07:002022-03-18T14:29:15.478-07:00Would that be kubios Premium or free.Would that be kubios Premium or free.Andy Mhttps://www.blogger.com/profile/05553609675601338087noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-54014389012996535322022-03-17T14:00:06.972-07:002022-03-17T14:00:06.972-07:00Resp rate data is now incorporated into kubios and...Resp rate data is now incorporated into kubios and appears pretty accurate. No, we have not looked at this in terms of a1. I am sorry but know nothing about that device.BJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-6802932402114876282022-03-17T13:08:03.708-07:002022-03-17T13:08:03.708-07:00Hi Bruce,
Has respiration rate been incorporated i...Hi Bruce,<br />Has respiration rate been incorporated into the DFA a1 studies? It would seem like a good metric to narrow down the VT1 and VT2 window levels.<br /><br />The Frontier X monitor measure respiration rate this but I cannot use with HRV logger since it does not send out RR signal. <br /><br />https://fourthfrontier.com/pages/know-the-science<br /><br /><br />Frontier sighted the following white paper.<br /><br />https://www.frontiersin.org/articles/10.3389/fphys.2017.00922/full<br />Thanks.Andy Mhttps://www.blogger.com/profile/05553609675601338087noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-34834213103076640642022-01-12T13:09:47.247-08:002022-01-12T13:09:47.247-08:00All good questions. Personal factors such as muscl...All good questions. Personal factors such as muscle fiber type, SNP variants, recovery ability all play a role. Even zone 1 volume can add to the "fatigue" load depending on your status. Your concerns mirror mine, and it's difficult to answer. Everything contributes to "load" including resistance exercise, long walks, extensive yard work etc so riding in zone 1 may not be too much depending. I would suggest taking 2-3 days off, no alcohol, plenty of sleep then do a baseline ramp to get some thresholds. See how that looks then begin some polarized training (even 95/5 easy/HIT) and follow the ramps every couple of weeks for progress. You will not lose conditioning by avoiding excess volume/intensity if you are careful. What you don't want is to over reach - you are better off on the other side of the spectrum (at our age). So keep the a1 above 1.0 on easy days and when you do your HIT, really blast it (but not too often). Hope this helps - BJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-13770350018212086822022-01-12T12:44:21.631-08:002022-01-12T12:44:21.631-08:00Thanks Bruce. All other things being equal (other ...Thanks Bruce. All other things being equal (other stressors are "normal"), do I need recovery from zone 1 training? Can I do it every day? I'm assuming I only need recovery from HIIT or an actual ride.<br /><br />My oura is always nagging me about HRV, but I figured I can still do zone 1 regardless. Should I take more days off? <br /><br />Prior to lactate and now DFAa1, my best guess was Maffetone's range, but even that is a rubric. For me, that would be about 118 bpm and he would want me to take off 10 beats for being on daily meds. Using lactate, I make some pretty quick progress and my heart rate at LT1 was in the low 130's and during summer, even with a fan blowing on me it would get into the mid to upper 130's. <br /><br />I tried to back off in yesterday's workout and keep DFAa1 higher. I ended up at 10 watts lower than my rested normal, but was only 1.0 mmol of lactate. Definitely easier. Am I going to lose conditioning this way, or will I facilitate batter recovery and ultimately a higher HRV and lower heart rate?Mike D.https://www.blogger.com/profile/15785874690878166566noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-43197334536689586472022-01-11T08:31:13.252-08:002022-01-11T08:31:13.252-08:00Hi Mike, I looked over your ECG files - the signal...Hi Mike, I looked over your ECG files - the signal is better, no severe arrhythmia that I can see but you should use the newest fatmaxxer as this puts a marker between "snips" so it's easier to see whats happening. Signal is good, near 1000 uV. The first day back after your trip was interesting. The higher than normal a1 is from excess artifact correction (I added the screenshot to your case study), but the a1 is about .75 during clean parts. That is in keeping with the lactate about 2 mmol. You did get down to about .6 DFA a1 toward the end. The second session had fewer artifacts and a1 was between .5 and .8 (graph added on your case). HR was pretty stable except for that interval with lower a1 values. I would view this as a sign that your autonomic NS is still a bit "stressed" from everything you mentioned. At this point I would trust the a1 for thresholds once you return to well rested normal (since we optimized the waveform voltage). Remember - it's also used for indicating fatigue - if your numbers are unusually low. I'm about your age and I do 90% of my training in zone 1 (a1 >.9) and the rest HIT twice a week. Recovery gets harder each year. You want high volume, low intensity, if you can manage the time. We are learning that pushing hard efforts when your ANS is showing stress may not be optimal - so I go by a1 rather than lactate or muscle O2 breakpoints. When we were 20 years old, it may not have mattered much, but at our age, recovery is key. I did not see any VPCs, but if you spot anything, send them my way.BJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-5873280310669038712022-01-10T15:48:37.750-08:002022-01-10T15:48:37.750-08:00I somehow posted the wrong link for the first Exce...I somehow posted the wrong link for the first Excel file from 1/9/2022. It should be this one: https://docs.google.com/spreadsheets/d/18NS8LaLAPpAbcZlhsRco1nYO8gfTwN_T/edit?usp=sharing&ouid=103340134804964568090&rtpof=true&sd=trueMike D.https://www.blogger.com/profile/15785874690878166566noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-68573503102495732452022-01-10T15:38:14.130-08:002022-01-10T15:38:14.130-08:00After drinking and eating too much, being jet-lagg...After drinking and eating too much, being jet-lagged, and probably being exposed to COVID during the previous 5 days, I was going to do a ramp test to check out wearing the Polar H10 inverted. I started 30 watts below my normal LT1 level of 165 watts. After 10 minutes at 135 watts, I was already at 2.1 mmol of lactate. My DFAa1 was .7, so even though my lactate shot up, this was encouraging as far as getting a useable signal goes. I added 10 watts to see where this would go and my lactate increased to 3.1, but so did my DFAa1 to 1.05. Added 10 more watts and my lactate rose slightly and DFAa1 rose higher. I then dropped back to 145 watts for the last 30 minutes and took a couple more lactate readings. <br /><br />Excel with graph of HR and DFAa1 and including table showing time, wattage, HR (2 min avg), DFAa1 (2 min avg), and lactate: https://docs.google.com/spreadsheets/d/18OIQYmPpluLW4NTFdWmY-ifBP8EPxwhJ/edit?usp=sharing&ouid=103340134804964568090&rtpof=true&sd=true<br />features file: https://drive.google.com/file/d/1wCUSeZhrInw43F5PE4MoBA4nXCzQ6gLm/view?usp=sharing<br />ecg file: https://drive.google.com/file/d/1wP4Xwt_n5JNJQccAM_YIZ1XS4Z_UTkEF/view?usp=sharing<br /><br />This morning, as I suspected, my lactate threshold improved with better sleep, no alcohol, and the workout yesterday. I warmed up for 15 min and made the ramps longer--9 minutes at power instead of 5 and measuring every 10 minutes (1 minute used measure lactate and record everything then change the power). I noticed yesterday I introduced artifacts while measuring lactate, so I changed the process and things settled down some. There was what I think was a PVC at about 45 minutes (I think I see it in segment 6). I had these about a year or two ago at rest, but they've largely gone away (with Mg and getting my thyroid under control). I've never felt one during exercise before--much more dramatic.<br /><br />Excel showing data table and graph: https://docs.google.com/spreadsheets/d/18VV6F50j0RTSzLsWJ4EjRzVHksOCVLnB/edit?usp=sharing&ouid=103340134804964568090&rtpof=true&sd=true<br />features file: https://drive.google.com/file/d/1xe53oVyui7Fk9gHIeLyzBkXzfKgczo9e/view?usp=sharing<br />ecg file: https://drive.google.com/file/d/1xixj3weTWUp_yb9FwIv_JZKXBzU8qgaN/view?usp=sharing<br /><br />I used conductive gel and with the H10 inverted, I'm definitely getting better signal. It seems like it's behaving better, but I'm not sure I can use this to fine tune my workouts. Today was a pretty good structured data set. The last 30 minutes of yesterday's workout and the last 15 minutes of today's were under constant load, but the DFAa1 seems to swing 0.40 over that time. <br /><br />I'm 63 years old. Prior to the pandemic, I was doing HIIT on the bike at the health club for the previous 3 years or so and no aerobics. Then stopped doing anything for almost a year during the pandemic. Then got a bike for home and started doing what I think are your Zone 1 workouts ( Iñigo San Millán's Zone 2 in 5 zone model). I went from an LT1 of 110 watts on March 1st to 165 watts on August 1st where I've plateaued. I've had zero reduction in resting heart rate or HRV in that time. It's normally around 72 at rest during the day and my Oura says it gets to the low 60's at night. So my lactate responded as you would expect (4 hours or more a week). My heart, not so much.<br /><br />Per your latest post, I think I'm definitely getting better signal with the H10 inverted, but I think I have some other issue going on with the HR and HRV. If there is discordance, do I train using lactate (which is a pain) to get better metabolically, or do I follow the DFAa1 and perhaps get better cardiac system benefits? Perhaps pushing harder to LT1 is going past where it's beneficial to my heart because it's more chaotic?Mike D.https://www.blogger.com/profile/15785874690878166566noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-50500436780925467442022-01-04T06:59:00.146-08:002022-01-04T06:59:00.146-08:00Thanks Bruce. I'm headed to the CES show in La...Thanks Bruce. I'm headed to the CES show in Las Vegas for the rest of the week. I'll try a workout when I get back to see what's changed. I've got conductive cream that I used to use with a different sensor a few years ago, although with these workouts I seem to be sweating enough and reading heart rate was never an issue with the H10. I guess we're trying to suss-out more information and need more signal instead of just heart rate now.Mike D.https://www.blogger.com/profile/15785874690878166566noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-47145436554950957902022-01-04T06:38:34.241-08:002022-01-04T06:38:34.241-08:00Both inverted are similar but the centered is slig...Both inverted are similar but the centered is slightly better (?). Signal to noise ratio improved but try to use some conductive cream under the sensor pads (moisturizer works fine) for optimal signal strength.<br />I'll put the pictures in the same place as the first screenshots for you to see. Last piece of the experiment - do a ride under the same conditions as before (a ramp and/or power about 165w) - we will see if the numbers are better.BJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-28937191906721668172022-01-03T18:58:36.948-08:002022-01-03T18:58:36.948-08:00I'm happy to have you post my data. Hopefully ...I'm happy to have you post my data. Hopefully it helps someone else get this working too. This is huge deal. Thank-you for the help and all that you are doing with this DFAa1 concept. <br /><br />Here is an ecg file from snapping the sensor into the strap upside down centered on my chest (fatmaxxer locked up after about a minute and a half):<br />https://drive.google.com/file/d/1sYUO4EGtNXxd3eW2jygdO71V61sXUoOM/view?usp=sharing<br /><br />Here is a file after moving the sensor an inch to my left with the sensor still upside down:<br />https://drive.google.com/file/d/1sry7oGPE-1Elluo3_aZJ5ZWtSgnWwSBI/view?usp=sharing<br />Mike D.https://www.blogger.com/profile/15785874690878166566noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-87319931048868015492022-01-03T16:31:59.621-08:002022-01-03T16:31:59.621-08:00Sorry you had to go through all that - whew! Howe...Sorry you had to go through all that - whew! However we now have the answer from your efforts. The ECG is inverted, either from having the polar module upside down or having a non standard cardiac axis. I have a post on that with some examples - http://www.muscleoxygentraining.com/2021/08/dfa-a1-and-optimal-hrm-position.html. I'm going to update that post with your data once we get this settled (if you don't mind). Suggestions - first try inverting the module (Polar name upside down) and save a Fatmaxxer ECG file. Then, with it inverted, move it left 1 inch and record another Fatmaxxer ECG - send me both and we will pick the best one (highest R peak). For now I added your ECGs to http://www.muscleoxygentraining.com/2021/04/quick-look-at-someones-ramp-data.html (the last case).BJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-5012155024743034502022-01-03T14:45:29.144-08:002022-01-03T14:45:29.144-08:00I've had a bit of adventure today, so I'm ...I've had a bit of adventure today, so I'm going to post the details in case anyone else runs into the same issue. I also posted this in the fatmaxxer github comments.<br /><br />I can't sideload apps because I use my phone for both personal and work use and work makes me install a mobile device management program that won't let me side load apps for security reasons. I have an old android tablet somewhere I could use if we can't make headway otherwise. Fortunately I've been using Polar Sensor Logger for my workouts for several months, so felt comfortable that I could do that--until I couldn't. <br /><br />The polar sensor logger app wouldn't create or graph an ecg file either. It's Google Play page says it needs firmware version 3.0.35 or later. I noticed that I was on 2.1.9, but the Polar Beats app wasn't offering an update. After scrounging around on the internet, I found others with the same issue and apparently you have to also download and install the Polar Flow app and create an account and then the Flow app actually offers the update. I did all this and it offered two updates in a row and now I'm at version 3.1.1.<br /><br />I immediately started fatmaxxer and saw it created an ecg file. I did this 2 or 3 times and saw 2 or 3 sets of logs including an ecg and figured my problem was solved. I went down on my bike to do a quick workout under load and capture an ecg file to reference here. Unfortunately, it didn't create one for that workout (so there is some residual ecg save issue). I was able to create an ecg file in the polar logger sensor app, or at least appear to. It will run for a bit and will say "waiting for ecg" and then after it started to display a number (some number of microvolts), it would run for 5 seconds more and hang up.<br /><br />Ultimately, I got some ecg files from both apps, but not necessarily while working out. Trying to view the fatmaxxer apps in excel doesn't look quite right since their seem to be multiple readings for the same timestamps. I'll post some links here and hopefully something in here will make sense.<br /><br />From fatmaxxer:<br />https://drive.google.com/file/d/1q1cLlDml0779La9tnMcuoASDeKynZPAN/view?usp=sharing<br />https://drive.google.com/file/d/1pl-4XKkfri6wGKYhWoukrzbOeV1eA4Il/view?usp=sharing<br />https://drive.google.com/file/d/1pPKdk50yL5DTfDQMgw2JI6GxVJ_YkPxL/view?usp=sharing<br /><br />From Polar Sensor Logger:<br />https://drive.google.com/file/d/11P04qQSO5ZhJn7ul4ixr1hS6tm_QWLjo/view?usp=sharing<br />https://drive.google.com/file/d/11Gf5WkHB7muJQQpXKtOTLkIrSbHbIQ-6/view?usp=sharing<br /><br />One of the fatmaxxer files looks like it starts out very large and then has an exponential decay to a steady state. I had one episode where I got several artifacts as soon as the session started, but then they stopped and got zero more after that.Mike D.https://www.blogger.com/profile/15785874690878166566noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-27871408255476487832022-01-03T08:31:20.573-08:002022-01-03T08:31:20.573-08:00Yes, go to https://github.com/IanPeake/FatMaxxer/b...Yes, go to https://github.com/IanPeake/FatMaxxer/blob/main/app-debug.apk and hit the download button on the right side of the screen (you may need to remove the playstore version to install this apk). Or use the app mentioned here - http://www.muscleoxygentraining.com/2021/03/polar-h10-ecg-tracing-short-how-to-guide.htmlBJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-24600795380451700862022-01-03T06:13:17.914-08:002022-01-03T06:13:17.914-08:00Although I have the app in Developer mode, I don&#...Although I have the app in Developer mode, I don't see any ecg files. I just see the rr, debug, and feature files of the last couple days. Do I need a later version than what's in the Google Play store?Mike D.https://www.blogger.com/profile/15785874690878166566noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-9623296410147965632022-01-02T14:33:37.535-08:002022-01-02T14:33:37.535-08:00Hi Mike, sometimes the h10 needs to be rotated a b...Hi Mike, sometimes the h10 needs to be rotated a bit to get an optimal signal. Can you share a link to the fatmaxxer .ECG file for me to see if that's an issue?BJRMDhttps://www.blogger.com/profile/03840322337577591292noreply@blogger.comtag:blogger.com,1999:blog-5699699130631903971.post-37849982680256361102022-01-02T14:05:01.514-08:002022-01-02T14:05:01.514-08:00Very interesting blog. Maybe I'm an outlier, b...Very interesting blog. Maybe I'm an outlier, but I measure my Lactate levels at the end of every workout which is on a stationary bike in "constant wattage" mode and usually lasts an hour. I'm trying to end up in a range of 1.5 to 2.0 mmol of lactate. There is some variance and I was looking at using fatmaxxer to help dial-in my workouts, but it doesn't seem to work for me. <br /><br />Despite working out at a constant 165 watts (with about a 10 minute ramp up at the beginning), the DFAa1 ranges between 0.4 and 0.6 in one session, and 0.35 and 0.45 in the other session. From what I've read, this shouldn't be happening. I should be well above my lactate threshold according to my DFAa1, but my actual lacate readings were 1.5 to 1.8 mmol. <br /><br />If I try to modify my workout and decrease power to get my DFAa1 to the 0.7 to 0.8 range, my lactate will be down near 1.0 mmol. <br /><br />I'm using the Polar H10 connected via BLE and don't seem to have many artifacts.<br /><br />My nighttime HRV per my gen3 Oura ring is in the single digit number of milliseconds (the gen2 ring had me at around 12 to 14ms avg HRV). Could it be that this DFA analysis doesn't really work for someone with such a small HRV or I have some other issue going on?Mike D.https://www.blogger.com/profile/15785874690878166566noreply@blogger.com