Tag Archives: HRV
In this talk, Randy Sargent shows how he used a spectrogram, a tool mostly used for audio, to better understand his own biometric data. A spectrogram was preferable to a line graph for its ability to visualize a large number of data points. As Randy points out, an eeg sensor can produce 100 million data points per day. It is unusual for a person to wear an eeg sensor for that long, but Randy used the spectrogram on his heart rate variability data that was captured during a night of sleep. In the video, you’ll see an interesting pattern that he discovered that occurs during his REM sleep.
“The heartbeat is a treasure chest of information…”
Mark Leavitt has a unique perspective in that he is both an engineer and a physician. In his retirement, he is applying his wealth of knowledge to keeping himself healthy.
In this talk, Mark looks at how heart rate variability relates to his willpower. Does he lift more weight when his HRV is high? What happens to his eating habits when his HRV is low? And if the term “heart rate variability” is new to you, Mark gives a lucid explanation.
Also, you will get a glimpse of his amazing customized workstation with pedals to keep him active, a split keyboard on the armrests to keep his knees free and built-in copper strips for measuring HRV. Cue envy.
Paul LaFontaine is the organizer for the Denver QS meetup and has given many fabulous talks on heart rate variability. If you are not familiar with HRV, you can think of it as the measurement of your nervous system’s reaction to a perceived threat.
“Vapor lock” is Paul’s term for that feeling when you are trying to retrieve something from memory in a conversation, but because of the stress of the situation (especially if it is with a boss), you lock up as your recall fails. To better understand this phenomenon and learn how to prevent it, Paul measured his HRV during 154 conversations with bosses and co-workers.
Because “vapor lock” is not a standard measurement, Paul shows the criteria he used to identify these moments in his data. His analysis revealed a likely cause for what locks him up, but it was not what he expected and it changed his approach to meetings and conversations at work.
If you want to watch more talks about heart rate variability, Randy Sargent showed us what his HRV looks like through a spectogram. Matt Dobson talked about using it, along with other measurements, as a way to passively detect emotions. And I used a HRV device to track my stress at work.
The DIY Scientist, the Olympian, and the Mutated Gene by David Epstein. There are several surprising twists in this story of a non-professional scientist named Jill Viles, who made an important discovery about her own rare genetic disorder. What inspired me mostwas Viles’ tenacious reliance on her own capacity to reason, even in the face of skepticism from professionals who had less knowledge (though more confidence) than she did. Eventually, she connects with highly technical scientists whose research direction she influences with her ideas. Epstein got a fantasic quote from one of them when he asked the scientist if this has ever happened before. “In my life, no,” he says. “People from outside coming and giving me hope? New ideas? I have no other example of this kind of thing. You know, maybe it happens once in a scientific life.” I found myself wondering if this kind of thing will be less rare in the future. -Gary
A Drug to Cure Fear by Richard A. Friedman. This article intersects two of my interests that stem from my own self-experimentation. From my stress tracking I realized that many of my reactions in my day-to-day life are influenced by traumatic memories. From my spaced repetition practice I learned how memories can change over time through retrieval and consolidation. A study done in the Netherlands suggests that a memory can be decoupled from an associated fear response by using propranolol which blocks the effects of norepinephrine, a chemical that strengthens connections in the brain. The study has yet to be replicated, but hopefully it will increase our understanding of trauma. -Steven
Internet of Things security is so bad, there’s a search engine for sleeping kids by J.M. Porup. Ever since doing a research project on data flows for our first Quantified Self symposium we’ve had what you might describe as a below average level of confidence in the security and reliability of information traveling outside the immediate context of its collection, now that APIs connect to APIs connecting to yet other APIs. Still, even I was surprised by the recklessness and potential harm described in J.M. Porup’s brief account of a search engine that displays random pictures from internet connected consumer cameras around the world. -Gary
Algae bloom toxin linked to Alzheimer’s, other diseases by Amy Kraft. One consequence of the climate change and the depletion of fish stocks in ocean’s is the increase occurrence of algae blooms. Ethnobotanists found a correlation between algal blooms and neurodegenerative diseases among remote populations in the Pacific. New research suggests that cyanobacteria, the microorganism in these blooms, has a neurotoxin that can cause neurodegenerative precursors that develop. This neurotoxin enters the human food chain as it bioaccumulates in fish and shellfish. -Steven
Glass Half Full Succeeds in Unwinding Upsets by Paul LaFontaine. Most people have moments of irritation or worry throughout the day. Paul wanted to find out what worked better as a response to these moments. Option A was to step back and observe his emotions in a manner similar to that taught by some schools of meditation. Option B was to figure out the source of irritation or concern and think of a positive angle to the situation. What is great about this post is the very simple but illuminating experiment that he devised to explore this question. -Steven
Finding My Optimum Reading Speed by Kyrill Potapov
As an English teacher Kyrill Potapov spends a lot of time working with 12 year old kids who are trying to improve their reading, writing, comprehension, and analytical skills. In this talk, he explores a remarkable method of speed reading, called Spritz, that promises to let you “read Harry Potter in three hours” with full understanding and recall. Could such a promise possibly be true? -Gary
Heart Rate Variability, Body Metrics, and Cognitive Function by Justin Lawler. This is a great examination of how Justin’s HRV measurements correlate to all other personal data he has collected. -Steven
Using Spectrograms to Visualize Heart Rate Variability by Randy Sargent
Randy’s idea about using spectrograms, normally used for audio signals, to create a portrait of your own time series data, is completely novel as far as I know. -Gary
Spurious Correlations by Tyler Vigen. An entertaining collection of unrelated facts that can be correlated with a high degree of confidence. -Steven
Hackers Diet, FIRECalc and weight loss by u/Thebut_. This chart is a mess, but the idea behind it is fascinating. This reddit user was inspired by FIRECalc, a financial tool that “projects your future assets based on historical market data” and tried to apply it to his weight data. Instead of giving a single projection, the tool shows a range of possibilities. This is similar to how Baseball Prospectus’s PECOTA system uses a weighted range of possibilities (probability distribution) rather than a single guess (point estimate) for forecasting a prospect’s future performance. I would like to see more of this kind of thinking applied to personal data. -Steven
Darwin Tunes by Bob MacCallum, Armand Leroi, Matthias Mauch, Steve Welburn, and Carl Bussey. A fascinating project that treats pieces of music like organisms that can mate and reproduce based on listeners’ votes. These audio loops started off as random noise, but as the generations moved into the thousands, the presence of chords and higher order melodies emerged. At this point, there have been over 8700 generations. You can take part yourself! -Steven
Let’s start 2016 with a very interesting talk by Randy Sargent about how to visualize the very large data sets produced by some kinds of self-tracking. Randy’s idea about using spectrograms, normally used for audio signals, to create a portrait of your own time series data, is completely novel as far as I know. If you have tried something similar, please get in touch.
Have you registered for our 2015 Quantified Self Europe Conference? If not, this weekend is your last chance to take advantage of our special early bird rate (€149!). We’d love to see you there so register today!
Our friends at Oura are currently crowdfunding their amazing heart rate, sleep, and activity tracking ring. Check out their Kickstarter to learn more.
Now, on with the show!
You may just have updated the map with your RunKeeper route by Alex Barth. Short post here describing a fascinating use of publicly available data from Runkeeper users around the world.
A Six Month Update on How We’ve Been Using Data, and How it Benefits All Americans by DJ Patil. A nice update on some of the current initiatives being championed at the federal level to make data more available and beneficial for all Americans. I can’t wait to see what happens next.
Discovering Google Maps New Location History Features by Mark Krynsky. Mark walks us through the new features embedded within Google Maps and Location tracking. Want to find out where you spend most of your time or how often you visit your favorite coffee shop? Google may already know!
Drowning in Data, Cities Need Help by William Fulton.
No city government, university or consulting firm can possibly figure out how best to use all the data we now have. The future lies in having everybody who understands how to manipulate data — from sophisticated engineering professors to smart kids in poor neighborhoods — mess around with it in order to come up with useful solutions.
Just Talking with Maggie Delano by Christopher Snider. Take a listen to a great conversation with our friend and QS Boston and QSXX organizer, Maggie Delano. Well worth your time.
HRV Measurements: Paced Breathing by Marco Altini. Marco is back at it again with a in-depth post about his experiments on how breathing rate affects HRV and heart rate measurements. Starting with a great review of the current literature, he then dives in to his own data and what he’s found through various experimental protocols.
Resuming Quantified Self Practices by Emily Chambliss. A short post here on using Excel to track and understand food consumption. Make sure to check out the slides from a talk she gave in 2012 at a New York QS Meetup.
My Sleep Quality of the last 2 Years by Reddit user Splitlimes. A beautiful visualization of just over two years of sleep data tracked with the Sleep Cycle app.
Time-histogram of 10 Million Key Strokes by Reddit user osmotischen.
These are plots of 10 million key strokes and about 2.4 million mouse clicks logged over a bit more than a year’s time on my computer. (Make sure to click through for more visualizations.)
From the Forum
Descriptives and visualizations for large numbers of variables
I created this site to make decisions better with an algorithm. I’d love feedback!
HRV apps for Polar H7 that include SDNN
We’re back with another episode of QS Radio! In our fourth episode we learn a bit about Steven Jonas, and the many different trackers he’s using and then it’s on to a great show&tell interview g with Mark Leavitt, co-organizer of the Portland QS meetup group about his experience with measuring HRV and it’s effect on his willpower. We wrap up as usual with a short discussion on things we’re finding interesting out there in the QS world. Click the links below to listen and/or subscribe and follow along with our show notes.
Download the episode here or subscribe on iTunes.
- Brian Levine used his YouUnlocked tool to recognize that he should drink more water.
- An example of a stick-on hydration patch
- Steven’s sleep tracking devices:
- Misfit Shine
- Basis Band
- ResMed S+
- Steven Zhang’s QS15 presentation
- Sleep-2-Peak, a tool for measuring restedness
- Mark Leavitt Interview
- Reddit post: Fitbit helped me figure out when my depression started
- Steven’s Stress Talk
- Michael Anthony: 2014 Annual Report
- Cesar Kuriyama 1 second everyday Ted Talk
- Ernesto’s Annual Report of Annual Reports
- Charlie Kimball’s race car driving with diabetes article
- Artificial Pancreas: Do-It-Yourself Pancreas System
- Richard Sprague’s UBiome analysis tools
Today’s guest post comes to us from our longtime friend and QS community member, Paul LaFontaine. Paul will be joining us at the QS15 Conference & Expo to share his expertise on tracking and making sense of heart rate variability. Read below, and then join us on June 18th through the 20th for three amazing days of talks, sessions, and meeting amazing innovators like Paul.
And when you got that look your brain just froze? You could not think of what to say? The start point for my work in Quantified Self was to try and understand that “freeze” phenomenon and how to train myself to experience it less. I negotiate a lot for business and my hypothesis was that control of physiological reactions in meetings could make me a more effective negotiator.
I had an excellent opportunity to see how I was doing this week as I briefed not one, but SIX Big Bosses. Nine people total were in the room. One Boss had showed up uninvited because he opposed the concepts being discussed. And to make matters even more fun, I was told I was the primary presenter thirty minutes before the meeting. After hearing that I thought, “This will be a great HRV reading.”
The meeting was on a controversial topic and several of the Big Bosses did not agree on how to resolve it. I had been asked a few weeks earlier to help create a resolution. We were scheduled for an hour. There were two points in meeting I remember feeling the “brain freeze” moment and had to push on by looking at the slide and restarting my mental engine. Because of the late notice that I was the presenter I could not use my standard practice of memorizing the material prior to a high intensity presentation. Here is my reading for the session:
This reading recalls the shape of the meeting very well. At the start each of Big Bosses tried to steer the meeting toward a resolution they thought was best. Big Bosses can’t help it, they get paid to steer. The Biggest Boss kept coming back to “let’s let him go through the material.” The dark blue from interval 426 to 2996 was me trying to get a word in edgewise.
In the middle of the meeting I had made my points and the Big Bosses began debating the merits of the resolution. As the spotlight moved from me I did deep breathing, listened and took notes. My memory of that period was that my brain was turned back on and I could feel a lighter feeling in my chest and head. The reading shows that I dropped from Fight/Flight as indicated by the white spaces from interval 2996 to around 6000.
Then the Biggest Boss said something to the effect that the resolution I had presented was incomplete. You can see around interval 6000 I go back into Fight/Flight as I was trying to explain how the missing part he was concerned with actually was completed. This lasted for a good period because other Big Bosses saw this as an opportunity to re-introduce their specific personal points and we were off and running. It was in this period I recall a specific “freeze” moment regarding a question on a detail that I resolved by having the group look at a different slide.
Finally I was able to get the Big Bosses to turn to the last slide where there was a collective “Oh, here it is” and you can see around interval 8900 my physiology begins to relax. The part of the resolution they were looking for was there. To my recollection the room relaxed as well. Some jokes where shared and people began to prepare to summarize and end the meeting.
During this hour long meeting I was in Fight/Flight 46% of the time, a full 27 minutes. I can’t reveal any details of the meeting, but I can believe that quality of my answers was more reactive and less thought out during those two periods. My personal variability training did make an important contribution as I was able to break up the 27 minutes into two periods that each had a specific topic I was “fighting” to make. In the first period I was concentrating on getting my main points across. Once done I was able to use my breathing and get myself to a relaxed state where I had ticked the box of “points made.” When the second period started I was only “fighting” to show the one completion point. I believe that if I had not allowed myself a completion state in the middle I would not have been as focussed on a single point which I was able to make in the end.
To see how much the environment like a meeting can change very rapidly, I had the opportunity to measure a meeting immediately after the meeting recorded above. As in I walked from the conference room for that meeting to the office for the meeting in a period of five minutes. I already had the kit ready so I just hit “record” for the second meeting.
In this second meeting I was brainstorming with a colleague on how to handle a problem that would play out over several months. There was no urgency, the colleague and I get on well and we were coming up with good ideas. Here is the reading:
That means I came from a pretty intense Big Boss meeting where there was a lot of Fight/Flight, did a BreatheSync session for two minutes and entered the second meeting. In this one there was very little Fight/Flight at all and it was a very productive 35 minutes.
Breathing tools, understanding how the physiology reacts when meeting with the Big Bosses and finding the balance between Fight/Flight and relaxation can improve both how you prepare, and how you ramp yourself down when in an intense situation. And these same tools allow a fast transition to a new environment where you can be productive as appropriate for the situation.
I will be presenting more about how I use heart rate variability at the Quantifed Self Conference and Expo in San Francisco June 18 – 20. I look forward to it and I look forward to meeting many of you there.
Paul LaFontaine is on an incredible journey to understand himself, his stress, and how he works through consistent examination of his heart rate variability (HRV). We’ve featured a few of his talks here on the Quantified Self website, and we were happy to have him present at a Bay Area QS meetup this past December. In this talk, Paul describes how he experimented with cognitive testing and recording his HRV to better understand if he was in a Flow state, and how to attain that balance between challenge and skill. Some very interesting personal conclusions about the role of belief in one’s own abilities versus actual skills.
Below you’ll find this week’s selection of interesting bits and pieces from around the web. Enjoy!
Open Books: The E-Reader Reads You by Rob Horning. A fantastic essay about the nature of delight and discovery, and how that may (is) changing due to data collected from e-readers. For those interested in books and data this article By Buzzfeed’s Joseph Bernstein is also an interesting read.
Flashing lights in the quantified self-city-nation by Matthew W. Wilson. Quantified Self, smart cities, and Kanye West quotes – this commentary in the Regional Studies, Regional Science journal has it all. Read closely, especially the final paragraph, which gives space to think about the role the institutions and companies that provide cities with the means to “be smart” have in our in social and urban spaces.
Most Wearable Technology Has Been a Commercial Failure, Says Historian by Madeleine Monson-Rosen. This is a interesting book review for Susan Elizabeth Ryan’s Garments of Paradise which had me thinking about the nature of wearables, customization, and expression.
‘The Cloud’ and Other Dangerous Metaphors by Tim Hwang and Karen Levy. This was mentioned so many times over the last few days by so many smart friends and colleagues that I had to set aside time to read it. It was time well spent. The authors make the case that how we talk about data (personal, public, mechanical, and bioligical) is tied to the metaphors we use, and how those metaphors can either help or hinder the broader ethical and cultural questions we find ourselves grappling with.
Why the Internet Should Be a Public Resource by Philip N. Howard. This isn’t the first, nor will it be the last, argument for changing the way we think about and regulate the Internet. Worth reading the whole things, but in case you don’t consider this point:
And then we might even imagine an internet of things as a public resource that donates data flows, processing time, and bandwidth to non-profits, churches, civic groups, public health experts, academics, and communities in need.
Computers Are Learning How To Treat Illnesses By Playing Poker And Atari by Oliver Roeder. How does research into algorithms and AI intended for winning poker games morph into something that can optimize insulin treatment? An interesting exploration on the background and future implications of computers that can learn how to play games.
Data Stories #45 With Nicholas Felton. by Enrico Bertini and Moritz Stefaner. In this episode of the great Data Stories podcast Nicholas Felton talks about his background, his interest in typography, and what led him to start producing personal annual reports. Super fun to listen to them geek out about the tools Nicholas uses to track himself.
Increasingly, people are tracking their every move by Mark Mann. A great peak into some of our QS Toronto community members and how they use self-tracking.
Quantified Existentialism by Ernesto Ramirez. I’m putting this last here because it feels a bit self-congratulatory. Earlier this week I took some time to examine how common it is for people to express their relationship with what counts when they use self-tracking tools. It was a fun exercise.
Insights From User Generated Heart Rate Variability Data by Marco Altini. While not a personal show&tell (however, I’m sure his data is in there somewhere), this great post details what Marco was able to learn about HRV based on 230 users and 13,758 recordings of HRV.
Quantify This Thursday: No Coding Required by Kerri MacKay. A bit different post here, more of a how-to, but I found it really compelling the lengths Kerri went to get get her Fitbit data to show up on he Pebble watch. I was especially drawn to her explanation of why this method is important to her:
The reality is, getting nudges every time I look at the clock or dismiss a text notification on my Pebble (via my step count) is yet another way to make the wearing-a-wearable less passive and the data meaningful.
Correlating Weight with Blood Pressure by Sam. A short and simple post detailing how Sam used Zenobase and his iHealth devices to see how weight loss was associated with his blood pressure.
The Effect of End of Year Festivities on Health Habits by Withings. The above is just one of four great visualizations from Withings exploring how the holidays affect how users sleep, move, and weight themselves. Unsurprisingly people are less likely to weight themselves on Christmas day (I looked at my data, I am among those non-weighers).
Simon Buechi: In Pure Data by Simon Buechi. A simple, elegant dashboard intended to represent himself to the world.
Grad School Coding Analysis by Matt Yancey. The above is just a preview of two fantastic visualizations that summarize the coding Matt did while enrolled in the Northewestern Masters of Analytics program.
News Year’s Eve Celebration in Steps by Lenna K./Fitbit. A fun visualization describing differences in how people in different age groups moved while celebrating the new year.
From The Forum
How do I visualize information quickly? (mobile app)
Monitoring Daily Emotions
Best Heartrate Monitor that syncs with Withings Ecosystem
Is the BodyMedia Fit still alive?
Capture Online Activities (and More) into Day One Journal Software (Mac/iOS)