The referee runs further than most players
A football REFEREE covers something in the region of ten to twelve kilometres during a match, which is further than several of the players being watched. They have to pass fitness tests to stay on the list, including timed sprints and repeated runs, and they are doing it while making decisions.
The job is also spectacularly unrewarding in public. Every call is replayed from six angles for an audience who have already decided, and a REFEREE who gets thirty decisions right and one wrong will be discussed entirely on the basis of the one.
Riding at forty miles an hour
A JOCKEY competes under a weight limit that includes the saddle, which means most professional flat jockeys weigh little more than fifty kilograms while being strong enough to control half a tonne of galloping horse.
They balance above the saddle rather than sitting in it, in a crouch that has barely changed since an American rider popularised it over a century ago and promptly started winning everything. It is among the most physically demanding positions in any sport, held at forty miles an hour, surrounded by other people doing the same thing.
Somebody is measuring everything
Modern players train wearing tracking vests that record distance covered, sprint speeds, accelerations and heart rate, and the data goes straight to a sports scientist and the PHYSIO. If a player's numbers drop in a particular way, they may be rested before they feel anything is wrong, because that pattern often precedes an injury.
The SCOUT has changed too. Talent spotting used to mean an experienced eye at a muddy touchline, and now it also means a database of every under-eighteen fixture in Europe. Clubs still send people to watch in person, because the numbers cannot tell you whether a fifteen-year-old sulks when losing.
The person inside the costume
Being a MASCOT is a real job with real problems. The suits are heavy and extremely hot, visibility is poor, and the performer has to entertain a crowd for hours without speaking a word, while children attempt to remove the head.
Football clubs take it seriously enough that mascots have their own competitive traditions, including races where large foam animals sprint against each other with predictable results. It is one of the few sporting roles where the entire point is that nobody knows who you are.
Most sporting careers are not playing
Very few people make a living as an ATHLETE, and almost every one who does retires by forty. The sport around them, though, employs enormous numbers: the COACH and MANAGER, the TRAINER, the INSTRUCTOR teaching beginners at a leisure centre, the LIFEGUARD, the groundstaff, the physiotherapist, the COMMENTATOR and the people who sell the tickets.
That is the useful message for a child who loves sport but is not going to play for anybody. The GOALKEEPER, the SWIMMER, the GYMNAST and the BOXER are the visible part of an industry that mostly consists of other jobs.
Several of those roles barely existed a generation ago. Performance analysts, nutritionists, strength coaches and sports psychologists are now standard at professional clubs, and the UMPIRE and LINESMAN increasingly work alongside video officials watching the same incident from a booth. A sport that once needed eleven players and a whistle now employs a small organisation.