Neverpedia
Pace & effort
Negative split
Completing the second half of an effort or race faster than the first.
A negative split is when you complete the second half of an effort, race, or interval faster than the first half. It is the gold-standard pacing strategy for most endurance events.
How it is measured
Compare elapsed time (or average pace/power) for the first half vs the second. If the second half is faster, you negative-split it.
Why it matters
Negative-splitting almost always produces a better total time than going out hot. Going out too hard burns through W', spikes lactate early, and forces the body into damage-control mode for the rest of the effort. Starting controlled lets you finish strong.
Common misconceptions
- A negative split is not about going easy in the first half. It is about going right in the first half.
- World-record marathon and 10K times are usually negative-split or even-paced, not positive-split.
- In short events (sub-5-minute), negative splits matter less — even-pacing or fast starts can win.
Related concepts
Threshold, Zone 2.