Evaluating time properly is crucial for everyday activities from fundamental behaviors to refined coordinative movements such as in sport playing. Lately the concept of the existence of a unique internal clock for evaluating time in different scales has been challenged by recent neurophysiology studies. Here we provide the evidence that individuals evaluate time durations below and above a second based on two different internal clocks for sub- and supra-second time ranges: a faster clock for the sub-second range and a slower one for supra-second time. Interestingly the level of precision presented by these two clocks can be finely tuned through long-term sport training: elite athletes, independently from their sport domains, generate better time estimates than non-athletes by showing higher accuracy and lower variability, particularly for sub-second time. We interpret this better time estimates in the short durations due to their extraordinary perceptual and motor ability in fast actions.
