3-2-1 — Do training zones actually matter?

Preview text: Why easy isn’t always easy, and why your zones aren’t fixed.

NduranzFriday, Sep 4, 2026 at 6:00 AM EasternKlaviyo
Nduranz3-2-1 — Do training zones actually matter?
Subject
3-2-1 — Do training zones actually matter?
Preview text
Why easy isn’t always easy, and why your zones aren’t fixed.
From
james@nduranz.com
Brand
Nduranz
Sent
Fri Sep 4, 2026, 6:00 AM ET
Sent to
China (nduranz.cn), nduranz.com, France (nduranz.fr), United States (nduranz.us)
Size
62 KB
Images
9
Links
10, 5 of them buttons
Subject length
44 characters

Against Nduranz's usual

Sent in its busiest hour, 6 AM, which holds 81% of its emails. The subject is 44 characters; its average is 49.

Email headers

What the brand's servers put on this email. Our receiving servers, the address we subscribed with and unsubscribe links are left out.

From
James from Nduranz <[email protected]>
Subject
3-2-1 — Do training zones actually matter?
Date
Fri, 04 Sep 2026 10:00:25 +0000 (UTC)
Message-ID domain
geopod-ismtpd-67
Return-Path domain
email.nduranz.com
DKIM signature
d=nduranz.com s=kl2
List-Unsubscribe
Present, one-click

Servers it passed through, newest first

  1. by recvd-…-57bkr with SMTP
  2. from (unnamed) by geopod-ismtpd-67 with HTTP

Other sending headers (names only): X-Kmail-Account, X-Kmail-Message, X-Kmail-Ops, X-Report-Abuse, X-SG-EID, X-SG-ID, X-Entity-ID

Report this email

Sent just before and after

Sep 25, 2026 6:00 AM3-2-1 — Can carbs work without swallowing them?
Sep 18, 2026 6:01 AM3-2-1 — Why bicarbonate can increase lactate
Sep 11, 2026 6:00 AM3-2-1 — Why Glycogen Matters More Than You Think
Sep 4, 2026 6:00 AM3-2-1 — Do training zones actually matter? (this email)
Aug 28, 2026 6:00 AM3-2-1 — Don’t waste the first 30 minutes
Aug 21, 2026 6:00 AM3-2-1 — When hunger is a fueling problem
Aug 14, 2026 6:00 AM3-2-1 — How much fatigue is too much?

More from Nduranz

All Nduranz emails

Get the Black Friday insights

We're collecting every Black Friday email from more than 50,000 brands as it lands. Get what we find: who starts first, the biggest discounts, and the subject lines that stand out.

Free. You'll get a confirmation email first, and you can unsubscribe anytime.