The Data Scientist: The Afternoon Slump, Part 1

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The Data Scientist: The Afternoon Slump, Part 1

Cha Li LUMO Data Scientist

Cha Li
LUMO Data Scientist

Wow, the past month has been pretty busy here at LUMOback. We’ve been building a lot of neat things with the data we have. One of the ideas that we’ve been working on is an algorithm that trains LUMOback to be more vigilant about monitoring your posture during certain points of the day, while cutting you a bit more slack at other points. As a starting point for this project, I’ve been analyzing how people’s posture varies throughout the course of the day and identifying interesting patterns.

I’ve noticed that my friends and I often experience an “afternoon slump,” especially after a heavy lunch or an early morning. In most cases the slump goes away after a caffeinated pick-me-up, but I was interested in how this afternoon dip in energy affects posture. In order to explore this question, I evaluated a sample of our most active users between the ages of 26 and 65.


The sample consisted of roughly 200 users covering a 1 month span containing about 4900 hours of sitting time and 2100 hours of standing time. The average posture values were calculated on an hourly basis across all days and each day was weighted by the amount of data collected that day. The following figure maps out average good sitting and good standing posture per day hour by hour:



Just focusing on primary work hours (8am – 6pm), there’s a clear dip for the sample users aged 46-65 around 1pm-2pm but good posture peaks again right before the work day ends. The sample users aged 26-45 fare a little better throughout the day but sitting posture begins to gradually deteriorate around 3pm. Fortunately, standing posture is better and more consistent among both age groups in our sample.


In the future, I’ll break down the “afternoon slump” even more and maybe discover certain groups of people who avoid it altogether (or a group more susceptible to it). In these situations an adaptive LUMOback feature would be an advantage, buzzing more when people are more prone toward slouching.

Do you experience the afternoon slump? Are you above or below the average posture values? Do you like the idea of an adaptive LUMO buzz?


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About Tansy

Tansy wears research, public relations and partnership hats at Lumo BodyTech. She is passionate about harnessing technology to support personal behavior change. Tansy’s background is in wearable tech and social entrepreneurship. She graduated from the University of Colorado with a BA in Social Marketing.

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