An Olympic record and a world record are separate categories, and the Olympic mark is often the slower of the two. The reason lies in what each measures.
The Olympic record is a venue-limited best
An Olympic record is the best performance ever produced within the Games themselves. Any mark set elsewhere, however superior, cannot enter the category.
Since the Games occur once every four years and world-level competition happens annually, most opportunities to set a fast time occur outside them.
The Olympic record therefore updates far less often, and the gap between it and the world record widens whenever a global best is set at another meeting.
Championship racing is tactical rather than fast
A championship final is a race for placing, not for time. Athletes run to win, which frequently means a controlled early pace and a decisive finish.
Circuit meetings are structured for fast times, using pacemakers and fields assembled to produce a target, neither of which exists in a championship final.
The result is that the fastest performances of a season are commonly produced outside the event that matters most.
Rounds impose accumulated fatigue
Olympic finalists reach the final through heats and semi-finals over several days, arriving having already competed hard while their circuit rivals arrive fresh.
Athletes manage those rounds deliberately, doing the minimum required to advance, which is a skill in itself and one that limits final-day peak output.
In endurance events the compounding is severe, and championship winning times routinely sit well outside what the same athletes produce in a paced race.
Conditions cannot be chosen
The Games are held at a fixed place and time, so weather, altitude, humidity and the state of the track or water are whatever the schedule delivers.
Circuit organisers choose venues known for favourable conditions and can schedule around forecasts, which is why particular meetings produce a disproportionate share of records.
Wind regulations in athletics add another layer, since a following wind above the permitted limit invalidates a mark for record purposes regardless of the result.
Both categories require the same ratification
A performance qualifies as a record only if the equipment, timing, officiating and anti-doping procedures at the event met the governing body's standards.
That is why some outstanding marks are never ratified, and why records set at unofficial or improperly measured events are excluded even when the performance was real.
Olympic competition satisfies those requirements automatically, which is one respect in which the Olympic record is the more reliably verified figure.
