Rugby sevens seems to fit the Olympics. The sport has, to a greater or lesser degree, the physicality of judo, the skill of rhythmic gymnastics, the athleticism of the 400m dash, the aggression of sprint cycling, and the gut-busting endurance of rowing. It’s fast and funky and fun. And it’s ready to bust out all over.

Sevens athletes range from amateur to semi-professional. They are among the fittest people at the Games. They mix sub-optimal endurance with high-octane effort. They need mental clarity under high fatigue. They train so hard they vomit. They run and run and run.