Figure 5. Protected and unprotected running speeds for optimal races. The red line represents even pacing. The area to its right represents positive splitting

From

Against Negative Splitting: The Case for a Counterintuitive Pacing Strategy for Elite Marathon Athletes in Official Events

G.D. Fernandes, Victor Maldonado

American Journal of Sports Science and Medicine. 2024, 12(1), 1-6 doi:10.12691/ajssm-12-1-1