Browse by exact outcome

Total sleep duration: every measured intervention

Ranked only against the same measurement, in the same unit. See the positive, neutral, opposite-direction and still-collecting evidence before deciding what is worth your own test.

Phoenix APOE4 Research · Reviewed by Kevin Tran, APOE4/4 carrier and founder · Data through 2026-08-23 · How to read this research

How to read this

Observational research: real APOE4 carriers tracked over time, each compared with their own earlier self. Members chose their interventions, with no randomisation or placebo group. Everything else they changed is shown beside each result.

Read the full methods and limits

Questions about Total sleep duration

What can improve Total sleep duration for APOE4 carriers?

For APOE4 carriers, Phoenix has published positive evidence for Earlier bedtime and ZenoWell taVNS against Total sleep duration. Two analyses found earlier nights about 30 minutes longer: 56 of 68 eligible members under one rule and 59 of 66 eligible members under a stricter rule. No blended response rate is published. Member #25E479 averaged 522 total sleep minutes on use nights versus 494 on comparison nights across 77 nights. Sleep regularity did not show a clear change.

What has Phoenix measured against Total sleep duration?

Phoenix has measured 3 interventions against Total sleep duration: 2 positive, 1 neutral. See the table below.

Every intervention measured against Total sleep duration

Interventions measured against Total sleep duration
InterventionWhat we observedEvidence status
Earlier bedtimeTwo analyses found earlier nights about 30 minutes longer: 56 of 68 eligible members under one rule and 59 of 66 eligible members under a stricter rule. No blended response rate is published.Repeated positive
ZenoWell taVNSMember #25E479 averaged 522 total sleep minutes on use nights versus 494 on comparison nights across 77 nights.Positive individual result
Sleep regularitySleep regularity did not outperform sleep duration on any matched-night definition tested in the published Phoenix evidence.Neutral result

What changed for real APOE4 carriers?

Search by health goal or intervention to see what changed for real members, including results that moved the wrong way.

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Sleep · Longer sleep · 3 interventions shown.

Health goalSleep
SubgoalLonger sleep

Longer sleep

Interventions tested: 3

Earlier bedtime

Sleep practicesOutcomes: 1

Total sleep: Increase 30 min

Sample: 68Average

Details

Two analyses found earlier nights about 30 minutes longer: 56 of 68 eligible members under one rule and 59 of 66 eligible members under a stricter rule. No blended response rate is published.

Earlier bedtime

✓Repeated positive

Two analyses found earlier nights about 30 minutes longer: 56 of 68 eligible members under one rule and 59 of 66 eligible members under a stricter rule. No blended response rate is published.

Selected member cases

  1. Phoenix memberAPOE4/447female
    74 to 80min

    Earlier nights were 74 to 80 minutes longer across 53 nights of wearable data.

    What else changed and what to test next

    What else changed: no nearby starts were recorded.

    Next study: repeat Total sleep duration after a dated Earlier bedtime window.

  2. Phoenix memberAPOE3/457female
    77 to 120min

    Earlier nights were 77 to 120 minutes longer across two independent recomputations.

    What else changed and what to test next

    What else changed: no nearby starts were recorded.

    Next study: repeat Total sleep duration after a dated Earlier bedtime window.

observations
2
nights
53

Full record

Sleep regularity

Sleep practicesOutcomes: 1

Total sleep: No improvement No advantage

Details

Sleep regularity did not outperform sleep duration on any matched-night definition tested in the published Phoenix evidence.

Sleep regularity

—Neutral result

Sleep regularity did not outperform sleep duration on any matched-night definition tested in the published Phoenix evidence.

Little published human data on this link yet.

Full record

ZenoWell taVNS

DevicesOutcomes: 1

Total sleep: Increase 28 min

Cases: 177 nights

Details

Member #25E479 averaged 522 total sleep minutes on use nights versus 494 on comparison nights across 77 nights.

ZenoWell taVNS

✓Positive individual result

Member #25E479 averaged 522 total sleep minutes on use nights versus 494 on comparison nights across 77 nights.

Little published human data on this link yet.

Selected member cases

  1. Phoenix memberAPOE3/458female

    Use nights averaged 522 total sleep minutes versus 494 on comparison nights across 77 nights.

    What else changed and what to test next

    What else changed: no nearby starts were recorded.

    Next study: repeat Total sleep duration after a dated ZenoWell taVNS window.

logged members
40
members with repeats
5
observations
1
nights
77
measurements
77

Full record

The Beat the Odds Study

The 43-page study: what members tried, how their bloodwork and wearable results changed, and what else changed alongside them.

Download the Beat the Odds Study

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