Training & Physiology

Breaking 20 Minutes in the 5000m: Why VO2max Alone Is Not Enough〜The Five Layers That Turn Aerobic Potential Into Speed

5000m sub20 capabilitiesKey Takeaways (Read this if you're in a hurry!)To break 20 minutes in the 5000m (4:00/km pace), ...

2026.07.14 2026.08.08

Training & Physiology

The “1+4 Jog” Method: A Simple Way to Build Speed Without Sacrificing Aerobic Fitness

Except on days dedicated to building aerobic endurance with long runs, I rarely rely on conventional steady-pace jogs fo...

2026.06.25 2026.08.08

Training & Physiology