Run — intervals
6 × 800 m — 4:21
- Warm up: 10 min very slow jog (the jog to the park IS this), then 4 relaxed 15-sec bursts
- Run 800 m in ~4:21 — hard but controlled; end each rep feeling you had 2 more in you
- Rep 1 AT 4:21, never under it — every second banked early gets paid back double late
- Recover 2 min jog, then go again — 6 reps total, then 5 min slow jog home
- Missing the times? Do fewer reps. Never run them slower — the pace IS the workout