The beginning

A crisp Saturday dawn with frost still on the paths and the world unusually still. I pulled on my running shoes, checked my watch, and pictured myself crossing a finish line three months out, with an ambitious half-marathon goal: 2 hours 5 minutes. The question kept forming with every step: can I hold this pace across 13.1 miles? What the next twelve weeks taught me wasn’t just fitness. It was the value of sticking to a structured plan and the confidence that builds mile by mile.

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The goal

A pace of 9:20 per mile (5:48 per km) takes three things:

• Speed: enough raw fitness to click off sub-10 miles for over an hour.
• Endurance: a strong aerobic foundation that keeps you comfortable as time accumulates.
• Mindset: trust your pacing, push when the effort gets hard, and stick with the schedule.

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Pre-requisites

Before starting, check the basics:

• Current 10K time: 45 to 50 minutes (or similar fitness). That’s the speed baseline.
• Weekly mileage: 20 to 30 miles (32 to 48 km) for the past four weeks or longer.
• Recent long run: 10 to 12 miles (16 to 19 km) completed without trouble.

If your numbers line up, you’re set. If not, spend a month building base with lighter runs and gradual weekly increases.

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How the plan works

Workout type	Purpose	Typical pace / effort
Easy run	Build aerobic volume, support recovery	Conversational pace (≈ 11:30–12:30 min/mi)
Tempo run	Raise lactate threshold, train “comfortably hard” pace	9:45–10:00 min/mi (≈ 80–85% HRmax)
Interval	Develop speed and VO₂ max	Short repeats (400 m–800 m) at 8:30 min/mi with equal jog recovery
Long run (LR)	Extend endurance, train fat metabolism	11:30 min/mi. Finish last 2 mi at goal race pace (9:20 min/mi).
Recovery / rest	Allow adaptation, prevent overtraining	Complete rest or light cross-training (cycling, swimming)
Cross-training	Strengthen supporting muscles, build general fitness	Low-impact activity, 30 to 45 min at moderate effort

These guidelines give you a foundation. Your breathing and fatigue should shape adjustments on windy, hilly, or sluggish days.

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Weekly plan (12 weeks)

Week	Mon	Tue	Wed	Thu	Fri	Sat	Sun
1	Rest	Easy 4 mi	Interval 5×400 m	Easy 5 mi	Rest or XT	LR 9 mi	Easy 3 mi
2	Rest	Easy 4 mi	Tempo 4 mi @ 9:45	Easy 5 mi	Rest or XT	LR 10 mi	Easy 3 mi
3	Rest	Easy 5 mi	Interval 4×800 m	Easy 5 mi	Rest or XT	LR 11 mi	Easy 4 mi
4	Rest	Easy 5 mi	Tempo 5 mi @ 9:45	Easy 5 mi	Rest or XT	LR 12 mi (last 2 mi @ 9:20)	Easy 4 mi
5	Rest	Easy 5 mi	Interval 6×400 m	Easy 5 mi	Rest or XT	LR 10 mi (cut-back)	Easy 4 mi
6	Rest	Easy 5 mi	Tempo 5 mi @ 9:30	Easy 5 mi	Rest or XT	LR 13 mi (last 3 mi @ 9:20)	Easy 4 mi
7	Rest	Easy 5 mi	Interval 5×800 m	Easy 5 mi	Rest or XT	LR 11 mi	Easy 4 mi
8	Rest	Easy 5 mi	Tempo 6 mi @ 9:30	Easy 5 mi	Rest or XT	LR 14 mi (last 3 mi @ 9:20)	Easy 4 mi
9	Rest	Easy 5 mi	Interval 8×400 m	Easy 5 mi	Rest or XT	LR 12 mi	Easy 4 mi
10	Rest	Easy 5 mi	Tempo 6 mi @ 9:20	Easy 5 mi	Rest or XT	LR 15 mi (last 4 mi @ 9:20)	Easy 4 mi
11	Rest	Easy 4 mi	Interval 4×800 m	Easy 4 mi	Rest or XT	LR 10 mi (taper)	Easy 3 mi
12	Rest	Easy 3 mi	Tempo 3 mi @ 9:20	Rest	Rest	Race day, 13.1 mi	Recovery walk / stretch

XT means optional cross-training (bike, swim, yoga). Adjust mileage by 10% based on how you feel.

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Detailed workout descriptions

Easy run

• Warm up 5 to 10 min easy jog.
• Run at a conversational effort. You can talk without breathlessness.
• Cool down 5 min walk plus light stretching.

Tempo run

1. Warm up 10 min easy.
2. Steady effort: 20 to 30 min comfortably hard. Short phrases only.
3. Cool down 10 min easy.

Interval session

• Warm up 10 to 15 min easy.
• Main set: pick your distance (400 m or 800 m). Run at speed (aim for 8:30 min/mi on 400 m efforts) followed by equal recovery time at an easy jog.
• Example: 5×400 m, 400 m jog, repeat.
• Cool down 10 min easy.

Long run (LR)

• Extend distance gradually with the pace relaxed.
• On weeks marked “goal-pace finish,” run the final 2 to 4 mi at 9:20 min/mi to rehearse race intensity.
• Eat and drink the way you plan to on race day (gels, water, sports drink).

Recovery / rest day

• No running. Sleep, hydrate, move gently (walk, foam roll).

Cross-training (XT)

• Pick something low-impact you enjoy.
• Moderate heart rate (about 70% HRmax) for 30 to 45 min.

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Notes and tips

• Progression: cap weekly increases at 10% to lower injury risk.
• Pacing tools: a watch or app for splits, adjusted for terrain.
• Flexible planning: miss a hard workout? Swap it with an easy day and keep the long run.
• Strength: two to three times weekly, 10 to 15 minutes on core, glute, and hamstring work.
• Nutrition: 30 to 60 g of carbs per hour on long runs. Stay well hydrated.
• Mental game: each session is practice, not a test. Notice what went right.
• Pitfalls:
  • Going out too fast on the long run.
  • Running through pain. Real soreness needs rest.
  • Skipping easy days. They’re the foundation.

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FAQ

Q: I missed a tempo run. What should I do? A: Slot the tempo into the next easy day, or move it forward a week and keep the long run intact. Weekly distance matters more than every single session.

Q: My pace feels off on hilly terrain. Do I need to adjust? A: Yes. Focus on effort. Keep heart rate or breathing steady rather than chasing exact splits.

Q: I’m sore after interval days. Is this normal? A: Some soreness is expected. If it sticks past two days, scale back the speed work, add recovery, and don’t skip stretching and foam rolling.

Q: Can I do the long run on a treadmill? A: Yes. Set the incline to 1 to 2% to mimic outdoor conditions and dial in race-pace segments.

Q: How do I know I’m ready for race day? A: You’re ready when the 3-mile tempo in the final week feels smooth and 9:20 min/mi feels doable for 6 to 8 miles at a time.

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Closing and suggested first workout

A 2:05 half is your own story, written one training mile at a time. Showing up week after week and tuning in to your body turns 9:20 pace from daunting to doable.

Start with an easy run:

• 4 mi at a comfortable, conversational pace.
• Steady breathing, smooth form.
• That’s the first stride toward the goal.

Stay flexible, lean into the training, and enjoy the process.

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References

• OTP Endurance Sports Half Marathon | running Training Plan | TrainingPeaks (Blog)
• MyProCoach Intermediate Half Marathon + Free Email Access to Coach: 10 Weeks | running Training Plan | TrainingPeaks (Blog)
• 1/2 Marathon 12 Week Beginner | running Training Plan | TrainingPeaks (Blog)
• BCA | Half Marathon ~ 6 wks. - ELITE - (7.5-8hrs/wk) + Free Consultation | running Training Plan | TrainingPeaks (Blog)
• 1/2 Marathon 16 Week Beginner | running Training Plan | TrainingPeaks (Blog)
• Half Marathon Training Plan | running Training Plan | TrainingPeaks (Blog)
• LEVEL 1 HALF MARATHON | Training Plan | TrainingPeaks (Blog)
• Guto’s Fernandes Plan - Half Marathon - Beginner - 14 Week - E-mail access to coach ( 2-5 Hrs/wk) | running Training Plan | TrainingPeaks (Blog)