Sub-3 Marathon: 2x2 Mile Threshold

Workout - Sub-3 Marathon: 2x2 Mile Threshold

• 12min @ 8'15''/mi
• 5 lots of:
  • 100m @ 5'00''/km
• 2 lots of:
  • 0.0mi @ 6'13''/mi
  • 3min rest
• 12min @ 8'15''/mi

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Here’s a breakdown of Week 1 from The FOD Runner’s sub-3-hour marathon program. The video is definitely worth watching, but we’ll walk you through the key sessions so you can get started today.

Key Points:

• The week starts conservatively: a 2 × 2‑mile threshold run and a 6 × 400‑m repeat on Thursday.
• The focus is on staying fresh and keeping mileage modest (weeks 6‑11 will ramp up significantly).
• All runs happen on trails to preserve joints and make training feel less punishing.
• Your target race pace (6:13 / mile) flexes with terrain—hills demand slower splits, descents allow faster ones.

Workout Example:

Tuesday – Threshold Run: Two rounds of 2 miles on varied trail terrain. Aim for ~6:13 / mile when the ground is even; expect your pace to tighten on climbs (closer to 6:02 / mile) and loosen coming down (around 5:59 / mile). Threshold work forms the backbone of marathon training because it teaches your body to hold a hard-but-sustainable effort for extended periods. That skill transfers across distances—whether you’re training for 26.2 miles or preparing for a 10K with proven pacing and training structures. Stay relaxed; this should feel controlled, not desperate.

Thursday – Speed Repeats: 6 × 400 m at a brisk pace (aim for 1:30‑1:35 per rep) with full recovery between efforts. The video mentions this session without diving deep into the mechanics. To understand why intervals matter, check out our guide to building interval workouts with science-backed structure and personalization. These 400m reps aren’t complex, but they’re the same tool used to develop 5K speed through interval work—versatile across any training plan.

Closing Note:

Run the 2 × 2‑mile threshold session on trails today, then dial in your paces with the Pacing app to match your fitness. Keep it enjoyable, prioritize recovery, and look forward to what’s ahead.

Watch the full video for additional context and coaching cues.

References

• Sub 3 Hour Marathon Training Week 1 | FOD Runner - YouTube (YouTube Video)