The findings across this dashboard converge: persistent non-dipping (from trustworthy cuff data), isolated nocturnal hypertension, a high morning BP surge, an HRV cliff, an arterial-stiffness signal, and a 2nd-degree family aortic history — sitting alongside genuine protective factors (fit, lean, endurance-trained, controlled daytime BP).

This is not one alarming number — it is a CONVERGING CLUSTER that independently predicts cardiovascular risk even with good daytime control [1][2]. Non-dippers carry higher arterial stiffness independent of daytime BP [3], and the whole pattern is exactly what a specialist should evaluate. This is a 'get properly assessed while it is addressable at 49' picture, not a 'something is wrong right now' one.

SEE A CARDIOLOGIST (hypertension/vascular). Frame it preventive: 'home monitoring shows a non-dipping nocturnal BP pattern with family aortic history — I'd like a proper evaluation.' Tests to ask for: (1) 24-hr ambulatory BP monitor (ABPM) to confirm the non-dipping, (2) baseline echo / aortic-root imaging given family history, (3) validated clinical PWV/tonometry (not the ring), (4) lipid panel + clinical BP, (5) the medication-timing question — evening lisinopril, decided AFTER ABPM, never self-adjusted. Do not let good fitness + daytime numbers talk you out of going.

The literature on WHEN cardiovascular events strike is one of the most replicated in cardiology: a robust MORNING PEAK (~6am-noon) for heart attack [1], stroke [2], and aortic dissection (peak 8-10am) [3] — driven by the waking sympathetic surge that spikes BP and clotting while suppressing clot-dissolving activity [4].

Your risk window is AMPLIFIED, not average. Your morning BP surge runs high (+10 mmHg surge = +22% stroke risk [5]), your non-dipping removes the night's protective off-period AND shifts some aortic-dissection risk into the night for people with your pattern [6], and your family aortic history matters because the aorta follows the same morning-and-winter clock [3]. Net: a pronounced morning peak PLUS an unusually loaded night.

Be most vigilant the first ~2-3 hours after waking through late morning, daily; extra on cold winter mornings. For exercise: KEEP riding in the morning (endurance training lowers stiffness [7] and not exercising is worse), but do NOT go straight from bed into a hard/cold maximal effort — warm up gradually, give yourself a buffer after waking, and save hard interval sessions for later in the day (and only after the aortic-cap question is cleared).

8-yr arc: stable ~165-170 (2018-21, low 162.5), a step-change to a ~182 plateau across 2023-25, now descending from a 185 peak to 176.

This is a set-point shift that held for ~3 years, not day-to-day noise. The current drop is the first sustained reversal since 2022 — a return toward your own established baseline, which is a body that has demonstrated it can hold ~168.

Keep the aerobic frequency; weight loss is a legitimate BP lever but is the byproduct here, not the target. Target 165-170 = your historical baseline, not an arbitrary goal.

Nocturnal systolic falls only ~6.2% on average; 1 of 26 nights reached the healthy >=10%. Persistent NON-DIPPING.

This is the single most informative finding in your data, and it is INDEPENDENT of your good daytime numbers [1][2][3]. Combined with ideal daytime BP it defines 'isolated nocturnal hypertension' — a named phenotype that independently predicts hard CV events [5]. Each 5% less dip ~= 20% higher CV mortality [2]. Non-dipping from real cuff logging is your most TRUSTWORTHY signal.

Confirm with a 24-hr ambulatory BP monitor (ABPM) — the gold standard that turns 26 home nights into a clinical read [6]. This is the #1 priority. Do NOT self-adjust lisinopril timing; bring chronotherapy as a question after ABPM.

CORRECTION from a 26-night cross-reference of YOUR data: nocturnal dip does NOT correlate with SpO2 (r=+0.26) or breathing disturbance (r=+0.11), and your overnight SpO2 is normal EVERY night (97.6-99.5%). The '82%' was a single momentary sensor minimum, not a real desaturation.

Your own data ARGUES AGAINST obstructive sleep apnea. If it were OSA, bad-dip nights would show desaturations — they don't. So the non-dipping is real (trustworthy cuff data) but the cause is most likely NOT apnea. The leading cause is autonomic: your nervous system staying in high gear overnight, which your HRV cliff directly signals [1].

Sleep study drops down the priority list (not ruled out — a real study measures more than a ring, but no longer the lead). Focus shifts to the autonomic causes: alcohol (running experiment), medication timing, sodium. ABPM still confirms the non-dipping itself.

Oura optical PWV ~7.6 m/s, vascular age ~46-47 vs actual 49. Near the healthy 40-49 reference band (~6.2 healthy, >=8 stiff) [3].

PWV is a validated independent CV predictor — ~15% risk per 1 m/s [1] — and it carries the MOST signal in people <=50, i.e. you [2]. Your value looks reasonable. BUT: this is an OPTICAL (PPG) estimate, and consumer PPG absolute values are unreliable [5][6]. PWV (structural) and non-dipping (functional) measure DIFFERENT things — a good PWV does NOT offset the non-dipping risk. Do not let this soft, favorable number override the hard, unfavorable BP pattern.

Use the trend for motivation, not decisions. A one-time validated cuff-based tonometry PWV would confirm the true value. Aerobic (not resistance) training lowers PWV ~0.39 m/s over weeks [4] — one week is noise, not proof.

Daytime BP now frequently ideal (103/66, 108/73, 109/77...). Mean of 16 ~122/82. Unmedicated baseline was 142/94.

Daytime control is real — lisinopril + 9 lbs lost are working in the DAYTIME window. But this is the easy window; the residual independently-predictive risk is at night (see dip). The historically high MORNINGS are likely the tail of nights that never dipped.

Keep doing what's working by day. The next gain is nocturnal — see the dip and OSA actions. Morning readings are the most diagnostic; keep capturing them.

9-mo HRV: ~37ms late 2025 -> cliff to ~30 in Jan 2026 -> sawtooth recovery. Alcohol nights visibly drop it (31 vs 37).

The cliff is a sustained autonomic step-down, and reduced HRV is independently associated with the blunted nocturnal dip [1] — so your low-HRV nights and low-dip nights are likely the SAME sympathetic-tone problem via two sensors. It also gives a modifiable readout: alcohol clearly costs you.

Minimize alcohol before hard training. Build training FREQUENT and EASY, not sparse and hard — frequency drives HRV gains [2][3] and serves the Tonga endurance goal.

Two independent stress signals over time: Garmin daily stress (0-100, 30 days) and Oura's stress-vs-recovery balance (% of active time in stress, 91 days). Both track your autonomic load day to day.

This is the DIRECT view of the mechanism behind your non-dipping. Your dip is driven by sympathetic tone that should quiet at night [1] — stress score IS that tone, measured. Spikes here (e.g. the 07-18 stress of 77) should line up with worse dips and lower HRV. It's the same story your HRV cliff, busy-calendar days, and non-dipping all tell, now shown as one trend.

Watch for sustained elevation, not single spikes. If the 7-day stress average climbs while HRV falls and dip worsens together, that's the autonomic pattern tightening — the cue to deliberately de-load (fewer late meetings, wind-down, no alcohol) and, if persistent, raise with your doctor.

Cross-referencing your Google Calendar (185 events) against your dips: busy days (>=5 events) mean dip 5.4% vs quiet days 6.8%. Correlation r=-0.30 — more scheduled load = worse (lower) nocturnal dip.

Your calendar is acting as a STRESS PROXY, and it points the same direction as everything else: your non-dipping is autonomic — a nervous system that doesn't downshift at night [1]. This is now a THIRD independent thread (HRV cliff + busy-day dips + the sympathetic-tone literature) all converging on the same mechanism.

This makes stress/wind-down management a real lever, not a platitude. On heavy-calendar days, protect the evening: no late meetings bleeding into bedtime, deliberate wind-down, no alcohol. Watch whether your dip is reliably worse the night after your busiest days.

5 rides in 12 days, easy (avg HR 120-130). Garmin flags 'high aerobic shortage' (zero high-intensity aerobic load).

Great base-building, but easy rides won't move VO2max or clear the aerobic-high shortage — and won't un-stick the Garmin VO2max. Swimming is the best-matched intervention for your BP + is literally the Tonga goal [2].

Keep the frequency for HRV/PWV/BP. Add ONE weekly higher-zone session (inside the 140 cap, pending the aortic-cap doctor question) to move VO2max. Swim when you can — it's the Tonga goal and the BP intervention at once.

10 logged days. CARB TIMING IS BACKWARDS: ride days avg 21g carbs, rest days avg 63g — 3x MORE carbs on the days you don't train.

This is inverted from endurance physiology: carbs replenish glycogen, glycogen fuels rides. You under-fuel training days and over-fuel rest days. NOTE: intake is under-logged and Garmin 'calories out' is partial-day (sync-capped), so the in-vs-out numbers are DIRECTIONAL only, not precise energy balance.

Introduce modest quality carbs AROUND rides (30-60g the evening before or morning of a ride: sweet potato, berries, rice) and stay low-carb on rest days. This fuels the work and aids recovery/next-day HRV without adding rest-day carbs. Sodium stays the BP watch-item.