16 Weeks of Runna Training. But I Made One Big Mistake (London Marathon 2025) - Shervin Shares

Aug 13, 2025

Intro: This is a quick summary of 16 Weeks of Runna Training. But I Made One Big Mistake from Shervin Shares. 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

AI‑driven plan: Runna creates a 12‑week marathon schedule based on your last race time and auto‑adjusts paces as you improve.
80/20 rule: 80 % of weekly mileage at easy effort, 20 % at quality work (tempo, intervals, long‑run pace).
Mix of outdoor & treadmill: The app lets you toggle between outdoor GPS and treadmill speed, keeping paces consistent.
Group runs & social accountability: Running with friends or a club helps you push through tough weeks.
Nutrition & hydration: Never skip pre‑run carbs, electrolytes, and water; learn from the “big mistake” of running low on salts.

Workout Example (all distances in miles)

Half‑mile race‑pace repeats – 5 × 0.5 mi at ~7:00 / mi (target 7:04, 6‑58, 6‑56, 7‑20). Warm‑up 0.5 mi easy, then repeat.
Mile repeats (low‑tempo) – 4 × 1 mi at 6:30 / mi, e.g., 6:45 for two miles, 6:30 for the next two.
Pyramid interval – 800 m @ 6:10 / mi, 400 m @ 6:20 / mi, 200 m fast, then back‑off.
Long run – Start at 11 mi, add 1 mi “extra credit” if experienced. Build to 20 mi, with the final 4 mi at tempo pace (6:45 / mi).
Deload week – Cut back to 7.5 mi easy, keeping effort low to recover.

Practical Tips to Try Right Now

Start easy: Keep the first long run under 12 mi; only add extra miles when you feel injury‑free.
Use Runna’s pace alerts: Set the app to buzz when you drop out of the target range.
Hydrate before you feel thirsty: Carry a gel and a water bottle; refuel every 45 min.
Run with a buddy: Pair up for the 5‑mi tempo or the 0.5‑mi repeats to stay honest with paces.
Customize in Pacing app: After you finish a workout, copy the paces into your own Pacing app and adjust for your current fitness.

Closing Note: Give these runs a go, tweak the paces to match your own speed in the Pacing app, and keep the 80/20 balance. You’ll feel stronger, more confident, and ready to tackle race day—just like Shervin did! 🎉