Subjective Perception of Time. The perception of time by an athlete is of considerable importance. This perception must endure although all the other things like looking for an open man, etc are going on. A batter might have an exageratedly long sense of time for the flight of a pitched ball. A diver or gymnast must have a sense of time for the bodies revolutions so that in a blind maneuver, when the athlete can't see the target, the athlete knows when to act properly like to straighten out for a landing.
Musicians obviously use an internal clock to keep track of musical pace.
The stroke of a rowing shell must set the pace to good accuracy without instruments. Perception of time undergo changes. The present research shows that our bodies contain clocks that measure intervals from fractions of seconds to minutes and even long circadian clocks that measure daily intervals. The perception of time is fairly stable but it is influenced by circumstances. When the clocks change, your perception of the passage of time changes.