Browse by exact outcome

Heart-rate variability: 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.

Research issue
Issue 01
Data through
2026-08-09
Evidence map version
v1.1.0
Explore the evidence Get the Evidence Map

How to read this

Phoenix research is longitudinal and observational: we follow real APOE4 carriers over time and compare each member with their own earlier self, with no placebo group, no randomisation, and members choosing their own interventions.

That means these are strong signals pointing at what to test next, not proof of cause. Most nutrition, supplement and lifestyle research you read online has exactly the same design. The difference is that we say so, and we show you the confounders.

Read the full methods and limits

What the Phoenix community is measuring

Browse exact outcomes and interventions. Each result keeps its source, measurement rule and audit record beside the claim.

Get the PDFJoin Phoenix in 7 minutes Open inside Phoenix

Recovery

Keep HRV, deep sleep and combined deep plus REM sleep as exact outcomes.

Most promising

Heart-rate variability

Verified wearable heart-rate variability · Aim: higher

Training and workouts

✓Positive individual result

The Trade-Off Athlete's next-day HRV was 29% to 32% higher across two computations; a separate retired case recomputed from plus 17% to minus 2%.

Selected member cases

  1. Trade-Off Athlete · APOE4/4 · male · age 50-59

    Next-day HRV was 29% to 32% higher across two independent computations.

    What else changed: no nearby starts were recorded.

    Next study: repeat Heart-rate variability after a dated Training and workouts window.

1 selected member case · not a response rate

Logged members
1
Members with repeats
1
Observations
1
Sources and context

Curated members with paired workout days and next-day wearable HRV under the reviewed computation.

  • report-lines-460-507, reviewed by independent verifier

1 selected case shown with this evidence.

This result was withdrawn: A different July case reported plus 17% across 141 days but recomputed to minus 2% and was retired.

ZenoWell taVNS

✓Positive individual result

The Current Convert's heart-rate variability was 3% higher on ZenoWell use nights after more data resolved July's opposite direction.

Selected member cases

  1. Current Convert · APOE4/4 · female · age 60-69

    Heart-rate variability was 3% higher on use nights after the larger evidence window resolved July's opposite direction.

    What else changed: no nearby starts were recorded.

    Next study: repeat Heart-rate variability after a dated ZenoWell taVNS window.

1 selected member case · not a response rate

Logged members
40
Members with repeats
5
Observations
1
Sources and context

Device-study members with real wearable HRV on logged use and non-use nights.

  • report-lines-414-430, reviewed by independent verifier

1 selected case shown with this evidence.

Keep the map

Take every result into your next experiment.

Get the Issue 01 Evidence Map by email. It groups the same evidence by outcome and by intervention, including what worked, what did not, and what Phoenix wants to test next.

Instant PDF · Issue 02 lands in your inbox the day it publishes · No spam

Turn evidence into your next test

Magnesium and homocysteine is 7 members from an answer.

Forty carriers with a dated start and a repeat blood test close it. Creatine, vitamin D3 and B12 sit further back. Your next blood test is somebody else's answer, and theirs is yours.

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