If you look back at our model, you can see that we are plotting distance (x) versus time squared (t 2) and these two should be proportional with the constant of (1/2)a. So, the slope of our ...

The study tested pacing in 38 schoolkids (age ~12) during a 750-meter running trial (five times 150-meter laps), comparing the effects of pacing by time versus distance.