The attribute of speed shares an interdependency with pace

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To make things more interesting, since Pace is nothing more than sustained speed, Speed shares an interdependency with Pace as well. Thus in order to effectively evaluate the Speed factor in a thoroughbred horse race, the distinction must be made between Early Speed as measured to the first call, and adjusted final time for the distance as measured by the speed figure; while remaining cognizant of the influence Early Speed exerts over the final time. (Since the faster a racehorse must run at the beginning of the race, the more likely it will expend too much energy and tire in the stretch).

In further analysis, since Early Speed is measured at the first call which occurs at two furlongs in sprints, and since pretty much any thoroughbred horse can go all out for such short distance; then what's important is not how fast a horse can run to the first call but rather, is the horse likely to secure a lead by the first call? Since this has more to do with running style than actual Speed, a vast array of new questions arise carrying the handicapper straight into analysis of the Pace factor - hence the interdependency.