How to Train for Your Best Half Marathon - Harry Runs

Aug 13, 2025

Intro: This is a quick summary of How to Train for Your Best Half Marathon from Harry Runs. It’s a great watch — we’re breaking it down so you can try the workout today. Be sure to check out the full video for all the details.

Key Points:

Gradually increase weekly mileage in small increments (e.g., add 0.5‑1 mile per week) and consider adding an extra running day.
Include a weekly long run that builds up to at least 10 miles (11‑12 miles if you’re comfortable) before race day.
Add a tempo run once every 7‑10 days, 3‑6 miles at slightly faster than half‑marathon race pace.
Do interval sessions such as 5 × 800 m (or 5 × 2‑minute efforts) with 2 minutes of light jogging between reps.
Keep quality over quantity: allow recovery days, avoid “lead‑leg” fatigue, and focus on good running form.
Vary terrain (track, trail, road) and wear shoes that allow natural foot spread.
Prioritize a high‑carb, fruit‑vegetable‑rich diet, 8+ hours of sleep, and a short nap if needed.
Taper 5‑7 days before the race with easy runs and maybe a light speed session early in the week.

Workout Example (sample week):

Mon: Easy run 4 mi @ comfortable pace
Tue: Interval session – 5 × 800 m fast (≈5‑6 sec/mi faster than race pace) with 2 min light jog recovery
Wed: Rest or cross‑train
Thu: Tempo run 4 mi at ~10‑15 sec/mi faster than race pace
Fri: Easy run 4 mi
Sat: Long run 10 mi at steady, conversational pace (build up weekly)
Sun: Rest or easy 2‑3 mi recovery jog

Adjust the distances and paces to match your current fitness using the Pacing app.

Closing Note: Give these tips a try and tweak the workouts to fit your own pace and schedule. You’ll feel stronger and more confident on race day—happy running! 🚀