Interval Workout at 14,265 feet (4347 m) - Seth James DeMoor

Aug 13, 2025

Intro

This is a quick summary of “Interval Workout at 14,265 feet (4347 m)” from Seth James DeMoor. It’s a great watch — we’re breaking it down so you can try the workout today. Be sure to check out the full video for all the details.

Key Points

Running at 14,265 ft (≈4,347 m) provides a strong aerobic‑base stimulus and boosts red‑blood‑cell production.
The workout is designed as a high‑altitude interval session that can be adapted to lower elevations by adjusting effort.
The author emphasizes running by feel, early‑morning discipline, and embracing a little “pain” to get stronger.
Practical tip: use a simple “5 × 500 m” repeat set followed by a descending‑ascending ladder (100‑200‑300‑400‑400‑300‑200‑100 m) for a focused VO₂‑max boost.

Workout Example

Warm‑up: easy run up the mountain (≈8 mi total to the summit) to get the altitude on.
Main set:
1. 5 × 500 m intervals at a hard, but sustainable effort (aim for 1–2 min rest or easy jog between reps).
2. Ladder – descending then ascending:
  - 100 m → 200 m → 300 m → 400 m → 400 m → 300 m → 200 m → 100 m, with short active recovery (easy jog or walk) between each segment.
Cool‑down: easy jog back down or a gentle jog for 10‑15 minutes.

All distances are in meters; the total uphill distance to the summit is roughly 8 miles (≈13 km). Adjust paces to match your current fitness level.

Closing Note

Give this high‑altitude interval ladder a try on your next hill or treadmill—adjust the distances and paces to suit your own training in the Pacing app. Enjoy the altitude boost and keep chasing those personal bests! 🚀