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nelliievance · 4 years

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Heart-Rate Accuracy Revisited

I’ve gotten some odd results, especially when working out at higher heart rates, from my Whoop strap: it can give what seems to be spurious high heart readings. It is especially bad when doing exercise with moving arms, like using my kayak trainer or walking with hand weights. But it even happens while bicycling. I had this issue in the past with wrist-based heart rate measurements (with a Fitbit). It’s pretty important for me, as someone who had Afib in the past, to monitor HR accurately. So I bought a Polar H9 chest strap, which is highly regarded for accuracy. This was an inexpensive solution at $55. There is a free app “Polar Beat” that pairs with the strap, and turns your phone into a fitness tracker, using both GPS and heart rate. I used that to compare vs. the readings from my Whoop..

This first is a simple 5 minute easy spin on my recumbent stationery bike trainer. Max HR is 104, but Whoop shows a spurious spilke to 130 BPM:

This is about 50 Minute walking with hand weights, so arms swinging about waist high. WHOOP has lots of spurious variation, and overpredicts Max HR by 39 beats:

I’ve done multiple test since and the results are similar: the Whoop often throws in spurious spikes to high heart rate, even while bicycling. Unfortunately, this severely limits the usefulness of Whoop as a training app. It still is good for predicting heart-rate variability, for recovery purposes. But it’s kind of pricy to pay $30 a month just for that. You’re supposed to also be able to use the app for training suggestions (using its “strain coach”). And these just can’t be trusted because they are based on heart rate. For a good example of how spuriously high heart rate readings can be misleading, consider the last paragraph of this previous post, where I went for a long comfortable bike ride but was misled into thinking I had gone too hard. I now know the readings were probably incorrect and my pace was probably just fine.

I will continue to use the Whoop until December because I’m prepaid for this year, and I want to continue monitoring to see if my heart rate variability keeps improving over time, which is a good sign my training is good for my health. After that I’ll switch to a much cheaper alternative (see below).

And for monitoring the intensity of my training, I am happy to now have my new strap and Polar Beat App.

Inexpensive Alternative for Monitoring Heart Rate Variability and Recovery- Hrv4Training

Recently I discovered the website Hrv4Training. They have an app for monitoring heart rate variability, all you need is a smart phone, with a one-time cost of $12. Hrv4Training was founded by Dr. Marco Altini, who has a PhD and two MS degrees in relevant fields and has published extensively on heart rate variability in the peer-reviewed literature. So the science behind the app and the website is sound. Also, the accuracy of the app’s results has been verified vs Electrocardiogram methods. Amazingly, all that is needed is putting your finger over the smartphone’s camera. Heart rate and HRV are then measured with the camera with a technique called “Photoplethysmography” (quite a tongue twister). However, if you have another way to measure HR like a chest strap, the app accepts that also. So I connected my Polar strap to the Hrv4Training app. For the last week and a half I’ve been comparing its results with Whoop. The exact values cannot be compared directly because the proprietary algorithm used by Whoop for calculating HRV differs from that used by Hrv4Training. But the trends agree very nicely: On days when one app says “you’re recovery is great, you can go hard today”, or “you’re recovery is poor, take it easy today”, the other agrees. So I’m now confident I can continue on with the Hrv4Training app after my Whoop subscription expires. The combination of recovery info from Hrv4Training and training intensity from Polar Beat will tell me all I need to know.

I have one minor enhancement I suggested for the Polar Beat app. They use the inaccurate formula 220-age to estimate max heart rate. They then use that to give feedback on what zone you are training in, which can be highly misleading. In my case, for example, the 220-age estimate is 18 beats too low: my max HR is over 170, not 152. The app should allow the user to enter a more accurate number for max HR if it is known.

Heart-Rate Accuracy Revisited published first on https://steroidsca.tumblr.com/

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tri-innescapable · 6 years

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79, 27 March, Luang Prabang

2 days of no plank and my first ever day of missing HRV4TRAINING reading - travelling. Did do 15000 steps walking around town yesterday, but not very cardio really.

After 11 hour sleep, big tropical rain in the morning so tour postponed. Did an hour in the gym instead and then had a rather unique 2-hour Laos-style massage (with Onnsi). It’s been a while so there was a lot of discomfort, but now feeling calm.

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connectyourbody-blog · 5 years

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Evaluar nuestra condición actual de salud es un requisito indispensable para saber nuestro punto de partida y conocer cual ha sido nuestro progreso dentro del periodo considerado. Puedes usar un par de variables relacionadas con tu corazón ♥, que miden tu estado de forma y tu nivel de estrés ⏺️HR o FC (ritmo cardíaco) ⏺️HRV o VFC (variabilidad de la frecuencia cardíaca) La primera de ellas es más habitual y la tienes en todos los relojes de actividad física. La HRV es menos habitual. Puedes utilizar aplicaciones que la miden a partir de la cámara enfocada hacia tu piel. Se mide con la variable rMSSD y es conveniente tener unos valores por encima de 40ms para combatir el estrés. Te recomiendo éstas aplicaciones (ambas sin necesidad de dispositivos adicionales) : ⏺️Pulse by cámara (gratis, en inglés, imagen mostrada) ⏺️HRV4training (de pago). . . #training #hrv #hr #healthapp #variabilidadedafrequenciacardiaca #frecuenciacardiaca https://www.instagram.com/p/B1Y0f8nIhi9/?igshid=1im9dv1jwczlq

#training #hrv #hr #healthapp #variabilidadedafrequenciacardiaca #frecuenciacardiaca

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xantarmob · 7 years

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HRV4Training – un incredibile tutor sportivo per iPhone e Android!

http://xantarmob.altervista.org/hrv4training-un-incredibile-tutor-sportivo-iphone-android/

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fishermariawo · 6 years

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Top 9 Keto Apps

I’m not a big app guy, instead preferring to keep a loose running tally of how I’m eating, training, and living, but my understanding is that kids these days love smartphone apps. Besides, I often forget that not everyone lives and breathes this stuff. Not everyone geeks out over all the minutiae and maintains an extensive database of keto and Primal-related errata in their heads.

So today, I’m giving you a list of the top 9 keto (and keto-relevant) apps.

CRON-O-Meter

I actually do keep this one on my phone. CRON-O-Meter (iOS, Android) draws on the latest USDA databases for nutritional info to help you track calories, micronutrients (including vitamins and minerals) and macronutrients (including specific amino acids, fatty acids, and carbohydrates) to plot them against the RDAs and see how much each food contributes. It keeps a running tally of everything you eat and gives you the lowdown on how close you are to fulfilling the RDAs for each nutrient. If you use the same email to login, you can access your account on your desktop, too.

While its intended audience is the CRON (calorie restriction with optimal nutrition) crowd, most of whom tend to be vaguely plant-based, the app is just a solid nutrition tracker that provides a lot of detailed information relevant to any type of eater, including keto dieters. It’s fun to enter a half a pound of beef liver and see your vitamin A, folate, and B-vitamin requirements instantly satisfied. The barcode scanner also works really well.

Keto dieters tend to focus only on macros—on carbs, protein, and fat—and ignore the micronutrients. This is the wrong course to take, and CRON-O-Meter will help you get your micros in order. Wondering about your potassium or magnesium or folate? It’s also good for carb counting, even if that’s not the express purpose of the app.

Only drawback is that it doesn’t track iodine or vitamin K2. USDA databases, start analyzing those nutrients!

Wholesome

Wholesome (iOS) is like CRON-O-Meter except it has better photos, it tracks phytonutrients like resveratrol and curcumin, and it’s clunkier. The photo-based interface, while nice, actually throws me off a bit. I just prefer text. If you’re more of a visual person, you’ll probably love Wholesome.

I will admit that it’s very cool to see how much L-dopa my food contains.

Carb Manager

Folks in the Primal Blueprint Keto Reset Facebook Group love Carb Manager (iOS, Android). It’s self-explanatory. Manage your carbs. The paid version gives you full access to micronutrient data.

I prefer CRON-O-Meter myself, but then again I like to geek out on micronutrients. If you like a slick interface and good functionality, Carb Manager might be the ticket.

Paleo (io)

How many times have you uttered the words, “Is it paleo?” How often does someone who knows you as the resident Primal expert ask it of you?

This is probably old hat to most of you. You can probably scan an aisle of food and immediately analyze the paleo-ness of the ingredients, complete with Terminator-style HUD readouts. Many of you have the answers.

It’s easy to forget how confusing this stuff can be to beginners. Paleo (io) (iOS, Android) answers “Is it paleo?” with a simple “yes” or “no.” Enter the food in question, get the answer. You can also search the app’s paleo food database of over 3000 foods to get more information.

I highly recommend beginners who want to stay keto and honor their biology while hewing to a Primal eating lens combine one of the food database apps like CRON-O-Meter or Carb Manager with Paleo (io). Use the various food trackers to check the carb count of your food, then run that through a Paleo (io) filter.

Senza

Senza (iOS, Android) is a decent introductory guide to keto with a good macro tracker. That’s its main claim to fame. It’s not why I’m recommending it, though (my Keto Reset is a bit better, if you ask me). I’m recommending it because of the 2000-strong recipe database.

I haven’t read through every last one. I’m sure there are some duds, maybe a few Splenda-bombs. The ones I did see looked great, and you can’t beat being able to whip out your phone at the grocery store at 5 P.M. with dinner fast approaching, select an app, and draw on hundreds of recipes to come up with a game plan.

KetoSense

This isn’t actually available yet. According to the iOS app store, the expected release date is October 14, 2018. But the premise is really cool: Search for keto-friendly menu items at restaurants near you. Sort of a “keto Yelp.’

If it works out, and it can actually pull enough data from restaurants, it should be a very useful app to have around.

Elite HRV

Why heart rate variability? What does this Elite HRV (iOS, Android) have to do with going keto?

HRV tracks stress resilience and recovery. If HRV is low, you’re probably worn out, overtrained, and overextended. If HRV is high, you’re probably full of energy, well-recovered, and well-balanced. A low HRV can mean that you’re training too much (or even too little, as regular physical activity increases stress resilience), and it almost certainly indicates that your diet and activity levels are mismatched.

Keto can be tricky for people used to training heavy, hard, and high-volume, at least when they’re first starting out. Tracking your HRV can help you figure out just how hard to go without derailing your diet—or how keto to go without derailing your training.

You do need an external heart rate monitor for this one.

HRV4Training

The beauty of HRV4Training (iOS) is that it uses the phone’s camera to track your HRV. Not quite as accurate as the HRV apps that use external monitors, but close enough to give you good data, especially if you track it consistently and observe the trends. You can’t beat the convenience.

Zero

Keto and fasting go hand in hand. When you go keto (or even just low-carb Primal), fasting just kinda… happens. Your ghrelin drops, you eat more fat and protein, you eat more nutrient-dense foods, you get incredibly adept at burning your own body fat, and all of a sudden you’re going longer between meals, and sometimes skipping them because you simply aren’t hungry. That’s fasting.

Zero (iOS) is a fasting tracker. You choose the fasting regimen you prefer—16-hour long fast, a “circadian rhythm fast,”or create your own schedule, then hit “start” and hit “stop” when you eat something. Over time, you accumulate reams of exportable data, which you can plot against bodyweight changes and relevant health markers to spot trends and identify connections.

Android users can try Vora.

What about MyFitnessPal?

Although I know it’s popular, I’d avoid MyFitnessPal. Its popularity is actually the root of the issue: because so many people use it, the nutritional database has become corrupted by inaccurate or incomplete user submissions. Stick with something like CRON-O-Meter that uses primarily the USDA and other official nutrient databases, unless maybe you’re only using it for macros.

That’s it for today, folks. Those are my 9 top Keto or Keto-related smartphone apps. What are yours?

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milenasanchezmk · 6 years

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Top 9 Keto Apps

So today, I’m giving you a list of the top 9 keto (and keto-relevant) apps.

CRON-O-Meter

Only drawback is that it doesn’t track iodine or vitamin K2. USDA databases, start analyzing those nutrients!

Wholesome

I will admit that it’s very cool to see how much L-dopa my food contains.

Carb Manager

Folks in the Primal Blueprint Keto Reset Facebook Group love Carb Manager (iOS, Android). It’s self-explanatory. Manage your carbs. The paid version gives you full access to micronutrient data.

I prefer CRON-O-Meter myself, but then again I like to geek out on micronutrients. If you like a slick interface and good functionality, Carb Manager might be the ticket.

Paleo (io)

How many times have you uttered the words, “Is it paleo?” How often does someone who knows you as the resident Primal expert ask it of you?

Senza

KetoSense

If it works out, and it can actually pull enough data from restaurants, it should be a very useful app to have around.

Elite HRV

Why heart rate variability? What does this Elite HRV (iOS, Android) have to do with going keto?

You do need an external heart rate monitor for this one.

HRV4Training

Zero

Android users can try Vora.

What about MyFitnessPal?

That’s it for today, folks. Those are my 9 top Keto or Keto-related smartphone apps. What are yours?

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cynthiamwashington · 6 years

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Top 9 Keto Apps

So today, I’m giving you a list of the top 9 keto (and keto-relevant) apps.

CRON-O-Meter

Only drawback is that it doesn’t track iodine or vitamin K2. USDA databases, start analyzing those nutrients!

Wholesome

I will admit that it’s very cool to see how much L-dopa my food contains.

Carb Manager

Folks in the Primal Blueprint Keto Reset Facebook Group love Carb Manager (iOS, Android). It’s self-explanatory. Manage your carbs. The paid version gives you full access to micronutrient data.

I prefer CRON-O-Meter myself, but then again I like to geek out on micronutrients. If you like a slick interface and good functionality, Carb Manager might be the ticket.

Paleo (io)

How many times have you uttered the words, “Is it paleo?” How often does someone who knows you as the resident Primal expert ask it of you?

Senza

KetoSense

If it works out, and it can actually pull enough data from restaurants, it should be a very useful app to have around.

Elite HRV

Why heart rate variability? What does this Elite HRV (iOS, Android) have to do with going keto?

You do need an external heart rate monitor for this one.

HRV4Training

Zero

Android users can try Vora.

What about MyFitnessPal?

That’s it for today, folks. Those are my 9 top Keto or Keto-related smartphone apps. What are yours?

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