This chapter takes up where the last one ended. We have (or our subconscious brain has) decided on an optimal pacing strategy for our distance race—the optimal means of expending energy (regulating speed) relative to time to provide the best performance result. Now, how are we going to go about doing this? We will hand this task over to an automatic motor oscillator within the central nervous system, one which has the wisdom to decide for runners how best to turn their legs over with time (stride frequency) and to determine the length of their stride. For swimmers,cyclists, and rowers, it’s probably the same story. The nature and even the location of this subconscious motor controller—driven by an internal clock—remains mysterious. But it seems most likely that athletes had best adhere to its decisions.