Chasing a 2:10 Half Marathon: A 10‑Week Journey

The goal

Target: half marathon (13.1 miles) in 2 hours 10 minutes.

That’s an average of 10:00 per mile. The pace takes a strong aerobic foundation, the ability to hold a steady tempo, and the head to manage faster intervals without blowing up.

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Pre-requisites

Before starting, you should be able to:

• Comfortably run at least 5 miles easy without stopping.
• Finish a 5K in 25 to 28 minutes (about 8:00 to 9:00 min/mile). That’s a sign your fitness is close to where it needs to be.
• Log 15 to 25 miles per week for the past three weeks.
• Be injury-free and ready for moderate-to-high volume training.

If most apply, you’re set. If not, spend a few weeks building mileage first.

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How the plan works

Four main workouts make up the program.

Workout	Purpose	Typical pace / effort
Easy run	Recovery, build aerobic mileage	Conversational, 60–70% max HR
Tempo run	Improve lactate threshold (the pace you can hold for an hour)	15–20 sec slower than goal half pace (≈10:15–10:30 min/mile)
Interval session	Boost VO₂ max and running economy	Faster than goal pace, 5K–10K race effort (≈8:00–8:30 min/mile)
Long run	Build endurance, train fat metabolism	Easy to moderate, 60–75% max HR, usually 1 to 2 min slower per mile than goal pace

Recovery matters as much as the hard efforts. That’s when the body absorbs the work. Cycling, swimming, or yoga can stand in for an easy run when you need low impact.

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Weekly plan (10 weeks)

Week	Mon	Tue	Wed	Thu	Fri	Sat	Sun
1	Rest or light cross-train	Easy 4 mi	Intervals 5×400 m @ 5K pace, 90 s jog	Easy 3 mi	Rest	Long 7 mi (easy)	Rest
2	Rest	Easy 4 mi	Tempo 3 mi (incl. 2 mi at tempo)	Easy 3 mi	Rest	Long 8 mi (easy)	Rest
3	Rest	Easy 5 mi	Intervals 4×800 m @ 5K–10K pace, 2 min jog	Easy 3 mi	Rest	Long 9 mi (easy)	Rest
4	Rest	Easy 5 mi	Tempo 4 mi (incl. 3 mi at tempo)	Easy 3 mi	Rest	Long 10 mi (easy)	Rest
5	Rest	Easy 5 mi	Intervals 6×400 m @ 5K pace, 90 s jog	Easy 4 mi	Rest	Long 11 mi (easy)	Rest
6	Rest	Easy 5 mi	Tempo 5 mi (incl. 4 mi at tempo)	Easy 4 mi	Rest	Long 12 mi (easy)	Rest
7	Rest	Easy 5 mi	Intervals 5×800 m @ 5K–10K pace, 2 min jog	Easy 4 mi	Rest	Long 10 mi (last 2 mi at goal half pace)	Rest
8	Rest	Easy 5 mi	Tempo 5 mi (incl. 4 mi at tempo)	Easy 4 mi	Rest	Long 13 mi (easy)	Rest
9	Rest	Easy 4 mi	Intervals 4×1200 m @ 5K–10K pace, 2 min jog	Easy 4 mi	Rest	Long 8 mi (cut-back, easy)	Rest
10	Rest	Easy 3 mi	Tempo 3 mi (incl. 2 mi at tempo)	Easy 2 mi	Rest	Race week: 2 mi shake-out (easy)	Race day, half marathon 2:10 goal

Easy runs stay conversational. Adjust mileage by 10% if you’re dragging.

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Detailed workout descriptions

Easy run

1. Warm up 5 to 10 min, brisk walk or light jog.
2. Run at a conversational pace (about 60–70% max HR).
3. Cool down 5 min easy plus stretching.

Tempo run

1. Warm up 10 min easy.
2. 1 to 2 min easy jog.
3. Main set: hold goal half-marathon pace + 15 to 20 sec per mile (about 10:15–10:30 min/mile). Start with 2 miles, build toward 4.
4. Cool down 10 min easy.

Interval session

1. Warm up 10 to 15 min easy.
2. Main set: the prescribed repeats (e.g. 5×400 m) at 5K race effort (about 8:00–8:30 min/mile). Jog 1 to 2 min between each.
3. Cool down 10 min easy.
4. Form: short strides, fast cadence, relaxed shoulders.

Long run

1. Warm up 5 to 10 min easy.
2. Run at a comfortable endurance pace, roughly 1 to 2 min per mile slower than goal race pace. Duration over speed.
3. In weeks 7 to 8, finish the final 2 miles at goal race pace to rehearse your race strategy.
4. Cool down 10 min easy plus stretch.

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Notes and tips

• Progression: cap weekly mileage growth at 10% to avoid overuse injury.
• Recovery: sleep, hydration, solid nutrition. Carbs fuel the work; protein aids repair.
• Pacing tools: a heart-rate monitor or GPS watch with pace zones keeps you in range.
• Pitfalls:
  • Running tempo and interval work too hard. You’ll crash before the finish.
  • Cutting corners on easy days. That undermines your aerobic fitness.
  • Pushing through minor aches. Address them with rest, foam-rolling, or a professional.
• Flexibility: on rough days, swap a tough session for easy running or rest. Following the plan loosely beats abandoning it.
• Mental game: break the race into pieces. Focus on the current mile during long runs.

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FAQ

Q: I missed a key workout. What should I do? A: Don’t double up. Swap it for an easy run and continue.

Q: My paces feel off. How can I adjust? A: Pull a recent race time (5K or 10K) and recalculate your zones. No race? Do a 1-mile time trial.

Q: Can I substitute cross-training for an easy run? A: Yes. Swimming or cycling at light intensity is fine.

Q: I’m sore after intervals. Is that expected? A: Some soreness is normal. Active recovery (easy jog, foam roll) and carbs within 30 minutes of finishing.

Q: I’m just starting and can’t hit the mileage yet. A: Add a 2-week base phase first. Build to 4 to 5 miles on easy days before tackling week 1.

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Closing and workout suggestion

Ten weeks of focused training will reshape your fitness. Stick with the plan, trust the process, and notice the gains, a smoother stride, steadier breathing, quicker intervals.

This week, run an easy 4 mi at conversational pace plus a 10-minute stretch. Put it on the calendar. The rest is showing up.

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References

• 1/2 Marathon 12 Week Beginner | running Training Plan | TrainingPeaks (Blog)
• 1/2 Marathon 16 Week Beginner | running Training Plan | TrainingPeaks (Blog)