Larchmont HRV Protocol
35ms baseline, driven by New Haven Line platform crowding. The 40-minute run to Grand Central is the shortest window on the corridor. Manor Park's shoreline still buys back a measurable HRV edge.
HRV Briefing — Larchmont
Baseline HRV: 35ms
Protocol Target: 54ms · Gap: +19ms
Primary Suppressor: New Haven Line platform crowding + compressed 40-minute pre-market window
Recovery Asset: Manor Park shoreline — 13 acres, 5,000+ ft of Long Island Sound frontage
Seasonal Factor: Smaller summer-to-winter HRV swing than Rye, reflecting Larchmont's more compact 1.1-square-mile waterfront footprint
The Compressed Window Problem
Larchmont's train ride runs about 40 minutes to Grand Central. That's the shortest inbound window on the Sound Shore corridor.
Rye commuters get 55 minutes to decompress before Manhattan hits. Larchmont commuters get roughly fifteen minutes less runway.
Shorter isn't always better. For HRV recovery, less time on the train means less time to downshift.
Upstream Sound Shore boarding fills the cars before Larchmont commuters get on. Standing room is routine on peak inbound trains.
A packed aisle is its own stressor. There's nowhere to sit and no room to settle into a protocol.
Most Larchmont boarders open work email on the platform, not the train. That habit front-loads cortisol before departure.
Larchmont skews toward finance-adjacent professional commuters. The inbox doesn't wait for a seat.
The Apollo Neuro protocol has to fit inside 40 minutes, not 55. It compresses the same vagal tone intervention into a shorter runway.
| Season | HRV Baseline | Driver |
|---|---|---|
| Summer | 37ms | Manor Park shoreline access + harbor activity |
| Fall / Spring | 35ms | Baseline commute pattern |
| Winter | 33ms | Reduced shoreline time + earlier dark commutes |
Larchmont's Compact Waterfront Asset
Manor Park delivers a real blue space benefit. It's just a smaller dose than Rye's larger shoreline system.
Thirteen acres. Just over 5,000 feet of Sound frontage, open dawn to dusk.
That's the entire natural recovery asset for a village barely a square mile wide.
Larchmont's coastal HRV benefit runs roughly +6ms versus inland Westchester. That's about 40% smaller than Rye's +10ms shoreline edge.
Scale explains the gap. Rye's beach club system spans a longer stretch of open coastline.
Larchmont Harbor adds a different flavor entirely. Yacht club sailing traffic defines this waterfront, not open beach recreation.
The Larchmont Yacht Club anchors that identity. Rye has no direct equivalent, and Larchmont has no beach club system to match Rye's.
Chatsworth Avenue sits inside that same compact footprint. A short walk connects the train platform to the harbor and Manor Park.
That walkability is the differentiator. Recovery access here doesn't require a car.
The protocol leans into it. A five-minute shoreline walk before boarding does real work on a compressed schedule.
Larchmont Resilience Protocol
Apollo Neuro — 40-min New Haven Line commute mode. Access →
Complete resilience protocol for Larchmont executives. View →
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