Howard Calvert runs sub-2:30 at 47

- Howard Calvert, 47, ran his first sub‑2:30 marathon at the London Marathon, marking a late‑career breakthrough. (runnersworld.com) - His profile details training volume, pacing changes, and recovery adaptations that made the sub‑2:30 possible despite age. (runnersworld.com) - The story reframes masters‑age performance as achievable with targeted planning and consistency. (runnersworld.com)