Marcel Hug, who won four golds in Tokyo but had to settle for two silvers and one bronze here so far, is well ahead in the men’s T54 marathon. Second place is Tomoki Suzuki of Japan, with Jin Hua of China third and David Weir of GB fourth, but no one has a chance of catching the leader.

According to LEXI, the T12 classification is “for runners with a visual impairment. Their vision is limited to a radius of less than five degrees and/or the ability to recognize a moving object at a distance of one meter.”

And T54 “is for wheelchair athletes who are fully functional in their body with moderately or severely impaired leg movement or the absence of legs. All generate power through the full range of body and arm motion, which provides good acceleration from the start and very responsive maneuvers during the race.”

Preamble