Thousands of runners will take to the streets of the capital this Sunday for the Cardiff Half Marathon.
Among them will be Roshan Khan, from Cardiff.
Following the death of his wife three years ago, and a quadruple heart bypass last November, he's determined to cross the line, raising money for cardiac services.
Despite joining a Cardiff-based running club, and participating in weekly Parkruns, Roshan was alarmed by how badly he struggled.
Friends at the club insisted he visited his GP.
Within months, he underwent a quadruple heart bypass.
Determined to find a way to fundraise for the "marvellous" care he'd received, Roshan set the target of running the annual Cardiff Half Marathon.
Rejoining his running club, he was encouraged by the support he received.