21.1 km — the distance where method gives you the biggest lever. Polarised 80/20, block periodisation, threshold training. Your plan knows your numbers and steers you towards your race pace over 12 weeks.
80 % in Z1/Z2, 20 % in Z4/Z5. The half marathon responds especially well to a clean intensity distribution.
Cruise intervals and tempo runs at threshold pace — the heart of your 20 % intensity share.
3–5 min intervals in peak weeks. They raise your speed ceiling above race pace, so race pace feels easier afterwards.
Base (4 wks) → Build (4 wks) → Peak (3 wks) + Taper (1 wk). Every block has its own training goal.
Specific race-pace runs in the peak phase. You run your race pace before you run it on race day.
7–10 day taper for the half marathon. Short but precise — volume down, sharpness up.
80% of your training in low zones (Z1/Z2), 20% in high zones (Z4/Z5+). The most effective approach to endurance performance — backed by Seiler (2010) and Stöggl & Sperlich (2014).
4-week blocks: Build → Build → Peak → Recovery. A systematic increase in load all the way to race day, through the Base, Build, Peak and Taper phases.
Training zones calculated with Coggan Classic (Z1–Z7) from your FTP, HRmax and threshold pace. No guesswork — precise targets for every session.
No hidden costs. Cancel any time.