Your split should be your goal pace that you swim in practice during a pace set.

用你自己的节奏，并给分段定下目标。

youdao

Once you have performed your sink-downs, try some easy laps of swimming. Swim at a slow pace and imagine you have all day to get to the other end.

一旦你做完下沉练习，再尝试一些容易的游泳技巧，慢速游并想象你有一整天才能游到另一端。

youdao

He learned to pace himself in each leg, how to swim in the wake of a competitor, how to locate his endurance zone on his aerodynamic time-trial bike.

WSJ: Jason Gay: Italian for Dinner, a Triathlon for Dessert