The false start threshold is a rule pretending to be physics

One hundred thousandths of a second was picked as the limit of human reaction, and sprinters have been disqualified by that guess ever since.

A sprinter is removed from a final for reacting in ninety nine thousandths of a second. Not for moving before the gun. For moving after it, faster than a committee decided a human being is able to move, on equipment that measures pressure against the pedal rather than anything happening in the nervous system.

I have never understood why this is treated as settled.

The number came from laboratory work suggesting that the time between a sound arriving and a muscle producing measurable force could not fall below about a tenth of a second. It was a reasonable estimate of a population limit. It was then written into the rules as a hard boundary for every individual, in every event, in every stadium, which is a different kind of claim entirely and a much weaker one.

There are real reasons to doubt it applies evenly. Sprinters spend years training a startle response to a specific sound at a specific volume, and trained responses to expected stimuli are not the same as naive laboratory reactions. Athletes in different lanes hear the speaker at slightly different moments unless the stadium is set up carefully, which it is not always. Force plates detect the beginning of a push, and an athlete already at high tension in the set position can register a change earlier than one who is loose, without having anticipated anything at all.

The counterargument is practical and it is not stupid. Officials need a bright line, because judging anticipation by eye across eight lanes in a stadium of sixty thousand people is impossible, and a fixed threshold at least applies the same test to everyone. Under the current one-and-done rule, an athlete gets no second chance either, which turns a debatable measurement into the end of a season.

What I would want is honesty about what the number is. It is an administrative convenience, not a discovery. Calling it the limit of human reaction gives it an authority it has not earned, and that authority is what makes a disqualification feel like a proven cheat rather than a failed threshold test.

Change the number, keep the number, argue about it. Fine either way.

Just stop telling a twenty two year old walking off the track in tears that science says they moved too soon.