Seth's 8-Mile Threshold

Workout - Seth's 8-Mile Threshold

• 0.0mi @ 8'00''/mi
• 5 lots of:
  • 100m @ 3'00''/km
• 0.0mi @ 5'22''/mi
• 12min @ 10'00''/mi

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Intro

Seth James DeMoor’s Race CANCELLED, 8‑Mile Threshold video deserves a watch. We’re unpacking the key elements so you can take this workout out for a spin today. The full video has more nuance and context worth exploring.

Key Points

• Weekly focus gradually increases intensity while dropping volume: beginning at 140 mi, dropping to 120 mi, then settling at 100 mi total.
• Threshold runs form the foundation of race-specific fitness, particularly for half‑marathon and marathon distances.
• This 8‑mile threshold session builds on a 3‑mi easy warm‑up, followed by strides and movement drills.
• Aim for a threshold pace around 5:20 – 5:23 per mile (example paces: 5:20, 5:14, 5:17, etc.), with average heart rate near 158 bpm and peaks around 167 bpm.
• Don’t lock into the schedule: if the planned session isn’t clicking, dial back to an easier run or swap in some track repeats to keep the intensity up.

Workout Example

1. Warm‑up – Run 3 mi at roughly 8 min/mi easy pace.
2. Strides & form work – Perform 4–6 × 100 m strides, concentrating on leg turnover and running form.
3. 8‑mile threshold run – Target roughly 5:20 / mi (around 84 min total). Maintain heart rate between 150‑160 bpm; tracking splits helps (e.g., 5:20, 5:14, 5:17, 5:23, 5:19, 5:16, 5:16).
4. Cool‑down – 5‑10 min easy running followed by stretching. The structure adapts well whether you’re running 4 mi, 12 mi, or 16 mi at threshold intensity — adjust pace to reflect where you are now.

Closing Note

Try this 8‑mile threshold workout sometime this week, then dial in your own training zones using the Pacing app. You’re building something real here—your race fitness will show for it! 🚀

References

• Race CANCELLED, 8-Mile Threshold - YouTube (YouTube Video)