Run — intervals
8 × 400 m — 2:13
- Warm up: 10 min very slow jog (the jog to the park IS this), then 4 relaxed 15-sec bursts
- Run 400 m in ~2:13 — hard but controlled; end each rep feeling you had 2 more in you
- Rep 1 AT 2:13, never under it — every second banked early gets paid back double late
- Recover 90 sec jog, then go again — 8 reps total, then 5 min slow jog home
- Missing the times? Do fewer reps. Never run them slower — the pace IS the workout