Runner Jarek Staszewski to cover 42 km on his 42nd birthday to help boy with Duchenne muscular dystrophy

On 29 August 2026, marathon runner Jarek Staszewski will run 42.195 km at Fort V Włochy in Warsaw to mark his 42nd birthday. Funds raised will support treatment for 7-year-old Leon Słomka, who suffers from Duchenne muscular dystrophy. The run is a personal charity challenge tying his age to the classic marathon distance.