Scullion's Persist & Prevail Threshold

Workout - Scullion's Persist & Prevail Threshold

• 10min @ 9'00''/mi
• 3 lots of:
  • 10min @ 5'09''/mi
  • 2min 30s rest
• 10min @ 9'00''/mi

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Intro

Here’s a breakdown of Threshold running Breakthrough: Persist and Prevail from Stephen Scullion, Olympic marathoner. Watch the full video for the context. The essentials are below so you can start this workout right away.

Key points

• Progress depends on consistency and patience. Show up, even on days when training feels tough.
• Aim for 45 to 60 minutes of Zone 4 / LT2 work (half-marathon effort) each week, split across your runs.
• A straightforward approach works: 3 × 10-minute intervals at threshold pace (roughly 5:03 to 5:15 min/mi for the author). Adjust by heart rate or feel.
• Pair threshold work with other intensities (V2 reps, 10k effort, easy runs) to keep training varied.
• Focus on your own process. Skip pace comparisons and trust your plan.

Workout example

Warm-up: 10-15 min easy jog
Main set: 3 × 10 min at threshold (~5:03-5:15 min/mi, Zone 4 / LT2)
  • Rest 2-3 min easy jog between reps
Cool-down: 10 min easy jog

You can embed a single 10-minute block into a longer run at the start or finish, or split it into 2 × 10 min or 4 × 5 min chunks. What matters is accumulating 45 to 60 min of threshold work weekly.

Practical tips

• Use your heart rate (around 510 bpm max) or perceived effort to stay in zone.
• Feeling flat? A steady, easy run day can restore your readiness.
• After altitude training, lactate levels recover fast. Expect full adaptation in 5 to 6 days.
• Keep it simple, stick to your plan, and only change course when something clearly needs fixing.

Closing note Try this threshold session this week. Dial in the paces for your own fitness using the Pacing app, and commit to the process.

References

• Threshold running Breakthrough: Persist and Prevail - YouTube (YouTube Video)