Norway’s Karsten Warholm poses with the scoreboard displaying his new world record after winning the men’s 400m hurdles  in Tokyo. Photograph:   Giuseppe Cacace/AFP via Getty Images

Shadows are falling and I’ve been here all day. The short walk from inside the Olympic stadium to the exit lighted up at the Main South Gate takes me (...)

 Norway’s Karsten Warholm after  winning the gold medal in the men’s 400m hurdles in Tokyo. Photograph:   Patrick Smith/Getty Images

Karsten Warholm could not feel his legs as he closed on the finish line. An accumulation of lactic acid is expected, and typically causes great discom(...)

Ireland’s Thomas Barr after finishing fourth in the semi-finals of the 400m hurdles at the World Athletics Championships in Doha, Qatar. Photograph: Morgan Treacy/Inpho

Faraway, so close. Thomas Barr came into the homestretch of the super competitive 400 metre hurdles with a place in the World Championship final at hi(...)

Ireland’s Thomas Barr during the Men’s 400m Hurdle heat two at the London Stadium. Photograph: PA

Never forget in a flat-out of race 400 metres, which includes 10 three-foot high hurdles and executed on a virtual tightrope, anything can and often d(...)