Sleep talk now online

[mattbell]

My talk on Sleep Hacking from the May Quantified Self is now online. Thanks, Alexandra!

Matt Bell - Hacking the Sleep/Wake Cycle from Loren Risker on Vimeo.

Comments

Question

[(Anonymous)]

Hey Matt. Thanks for the video review of the Zeo! so helpful.

I'm about to buy this thing and I was wondering if you'd be willing to answer two questions for me:

1) Are you able to find a correlation between sleep architecture patterns and how refreshed you feel the next day?
This would be encouraging to me because it implies that the zeo is accurate and precise enough to be helpful. (EEG requires so much artifact removal that I never really trust the data)

2) I'm primarily interested in zeo's ability to correctly track deep sleep. Any light you can shed on how well it does this?

Thanks!
-tom

Re: Question

[nasu-dengaku.livejournal.com]

(1) I don't track "refreshed" but I do track "engaged" (how focused I felt) and "happy". Interestingly, there was not a strong correlation between Zeo's "ZQ" measurement and how I felt the next day on either of these metrics. I think there might be multiple factors contributing to this that cancel one another out:
- If I'm excited about some big event the next day (which will tend to raise happiness and engagement) I'm often up late preparing for it, or the excitement prevents me from getting to sleep earlier.
- However, if I sleep poorly (in general) I'm going to be more tired the next day, which would be expected to lower happiness and engagement.

(2) I can't attest to its accuracy at tracking track deep sleep directly, but the patterns of when deep sleep occurs for me tend to match what you see in sleep architecture diagrams in textbooks. The data certainly is somewhat noisy, but the similarity to what sleep architecture *should* look like gives me some confidence. Zeo does appear to be more liberal in labeling sleep as deep sleep than the human graders in my sleep study.

Re: Question

[(Anonymous)]

Thanks for your input Matt.
Much appreciated!

I'm going to go order the zeo off amazon today.

-tom