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Summer running is secretly making you better.

The adaptation your body builds in the heat that pays off in October.

Engo EyewearThursday, Jun 4, 2026 at 5:09 AM EasternKlaviyo
Engo EyewearSummer running is secretly making you better.
Subject
Summer running is secretly making you better.
Preview text
The adaptation your body builds in the heat that pays off in October.
From
anna@engoeyewear.com
Sent
Thu Jun 4, 2026, 5:09 AM ET
Sent to
engoeyewear.com, es.engoeyewear.com, fr.engoeyewear.com, it.engoeyewear.com
Size
52 KB
Images
20
Links
10, 1 of them buttons
Subject length
45 characters

Against Engo Eyewear's usual

Sent in the 5 AM hour, which holds 9% of its emails; 16% arrive in the 11 AM hour. The subject is 45 characters; its average is 39.

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From
Anna at engo <[email protected]>
Subject
Summer running is secretly making you better.
Date
Thu, 04 Jun 2026 09:09:18 +0000
Message-ID domain
klaviyomail.com
Return-Path domain
k3.send.engoeyewear.com
DKIM signature
d=shared.klaviyomail.com s=def1; d=send.engoeyewear.com s=mtd1
List-Unsubscribe
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Servers it passed through, newest first

  1. from kl-203-16-3.kmta.shared.klaviyomail.com [170.203.16.3] by our receiving server with ESMTPS
  2. from (unnamed) by kmta-mta-blue-….servers.clovesoftware.com with SMTP

Other sending headers (names only): X-Mailer-Info-Extra2, X-Mailer-Info, X-Mailer-Info-Extra, X-Kmail-Account, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse

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Sent just before and after

Jun 23, 2026 11:22 AMThe runners who track the most data aren't the fastest.
Jun 10, 2026 3:26 AMYour engo3 is waiting. Here's how to make it yours in 5 minutes.
Jun 4, 2026 5:09 AMThe runners who train in the heat come back faster in the fall.
Jun 4, 2026 5:09 AMSummer running is secretly making you better. (this email)
May 27, 2026 11:23 AMYou're not getting slower. It's the heat.
May 19, 2026 3:56 AMMile 20. The race you actually trained for starts here.
May 19, 2026 3:56 AMMile 20 is where most people's race ends. Not yours.

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