IAAF

Janek Oiglane of Estonia competes in the men's decathlon shot put event during the 15th IAAF World Championships at the National Stadium in Beijing, China August 28, 2015.

Fabrizio Bensch/Reuters

Janek Oiglane of Estonia competes in the men’s decathlon shot put event during the 15th IAAF World Championships at the National Stadium in Beijing, China

Competitors jump a water obstacle in the men's 3000 metres steeplechase heat during the IAAF World Athletics Championships at the Luzhniki Stadium in Moscow...Competitors jump a water obstacle in the men's 3000 metres steeplechase heat during the IAAF World Athletics Championships at the Luzhniki Stadium in Moscow August 12, 2013.

Kai Pfaffenbach/Reuters

Competitors jump a water obstacle in the men’s 3,000m steeplechase heat during the IAAF World Athletics Championships at the Luzhniki stadium in Moscow on Monday

Sprinters from the Netherlands practice their starts

Kai Pfaffenbach/Reuters

Sprinters from the Netherlands practice their starts during a training session for the IAAF World Athletics Championships at the Luzhniki stadium in Moscow