Half-Marathon Training Program

Here’s a 12-week training plan to help you prepare for a half-marathon (13.1 miles). The plan gradually increases in intensity to build endurance, speed, and overall running fitness. It’s suitable for beginners or those looking to improve their half-marathon time.


Program Details
  • Duration: 12 weeks
  • Frequency: 6 days per week (+1 rest day)
  • Gear needed: Running shoes and a dream
  • What you'll do: running and breathing exercises
  • What it'll prepare you for: crushing a half-marathon

The Runs You'll Do

#1: Long Runs 🐉

Long runs are the cornerstone of endurance training. They improve your aerobic capacity, muscular endurance, and mental stamina. Long runs should be done at a comfortable, conversational pace, allowing you to cover the distance without excessive fatigue.

Long runs improve your lactate threshold, which is the point at which lactic acid builds up in the muscles faster than it can be removed. By increasing your lactate threshold, you can maintain a faster pace for a longer time without fatigue.

#2: Interval Runs 👯

Interval training involves alternating between periods of high-intensity running and recovery. This type of workout improves your anaerobic capacity, enabling you to run faster for longer periods.

A common approach is the 400-meter repeat: run 400 meters at a fast pace, followed by a 200-meter jog or walk for recovery. 400 meters = a quarter mile.

You can also time your intervals, which I prefer. Here's an example - run for a minute, walk for a minute, run for forty-five seconds, walk for 1:30, run for 30 seconds, walk for two minutes. Repeat 4+ times.

#3: Tempo Runs 🐎

Tempo runs involve running at a comfortably hard pace - slightly faster than your typical running pace but sustainable for a longer duration.

Tempo runs improve your lactate threshold, which is the point at which lactic acid builds up in the muscles faster than it can be removed. By increasing your lactate threshold, you can maintain a faster pace for a longer time without fatigue.

#4: Hill Repeats 🐏

Hill repeats are an excellent way to build strength, power, and speed. Running uphill forces you to engage more muscle fibers, particularly in the legs and corewhile also improving your cardiovascular fitness.

Find a hill with a moderate incline and run up at a hard effort, then jog or walk back down for recovery. Repeat the cycle multiple times, gradually increasing the number of repetitions as you get stronger.

Before You Begin

Warmups 🔥

  • A proper warm-up is essential for preparing the body for the physical demands of running. By gradually increasing your heart rate and blood circulation, a warm-up ensures that more oxygen and nutrients reach the working muscles.
  • This improved circulation enhances muscle function, elasticity and endurance, allowing you to run more efficiently and effectively. Warm-ups help activate the nervous system, improving coordination and reaction times.
Try to start your runs with a 5 minute warm-up of light jogging.

Running Drills 🛠️

As you continue to train, you'll need more targeted ways to warm up your body and dial in your body mechanics.

Check out our Running Drills when you're ready:
Running Drills | Sendō
Running drills can be a game-changer. These simple, focused movements improve your form, increase your speed, and reinforce proper biomechanics.

Cooldowns ❄️

  • A cool-down is as essential as a warm-up, as it helps the body transition from an active state to a resting state. It gradually lowers your heart rate and breathing, helping to prevent dizziness or fainting caused by a sudden stop in activity.
  • A cool-down also aids in the removal of metabolic waste products, such as lactic acid, which can accumulate during exercise and contribute to muscle soreness.
End each run with a 5-10 minute cool-down walk. Bonus points for a stretching session (e.g. 10 minutes of yoga) and deep breathing exercises.

Final Tips 🏁

  • Get at least 7 hours of sleep. No excuses.
  • Eat lots of protein and carbs (you’re burning a ton of calories).
  • Accountability: Keep a physical wlog. Track reps, miles, and rest times.
  • Never stop mid-workout: If you’re out of breath, slow down, but don’t quit. Push through even if you feel like hell. Just finish the reps.

The Program

WeekMonTueWedThuFriSatSun
130 min cross3 mi run4 mi run3 mi runRest3 mi run4 mi run
230 min cross3 mi run4 mi pace3 mi runRest3 mi pace5 mi run
340 min cross3.5 mi run5 mi run3.5 mi runRestRest6 mi run
440 min cross3.5 mi run5 mi pace3.5 mi runRest3 mi run7 mi run
540 min cross4 mi run6 mi run4 mi runRest3 mi pace8 mi run
650 min cross4 mi run6 mi pace4 mi runRest or easy runRest5-K Race
7Rest4.5 mi run7 mi run4.5 mi runRest4 mi pace9 mi run
850 min cross4.5 mi run7 mi pace4.5 mi runRest5 mi pace10 mi run
960 min cross5 mi run8 mi run5 mi runRest or easy runRest10-K Race
10Rest5 mi run8 mi pace5 mi runRest5 mi pace11 mi run
1160 min cross5 mi run6 mi run4 mi runRest3 mi pace12 mi run
12Rest4 mi run4 mi pace2 mi runRestRestHalf Marathon

Up Next
Marathon Training Program | Sendō
Here’s an 18-week training plan to help you prepare for a marathon race (26.2 miles). It’s suitable for beginners or those looking to improve their marathon time.

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