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

G.D. Fernandes^1, and Victor Maldonado¹

¹Mechanical Engineering department, Texas Tech University 2500 Broadway St, Lubbock, TX 79409, United States

Cite this paper

G.D. Fernandes and Victor Maldonado. Against Negative Splitting: The Case for a Counterintuitive Pacing Strategy for Elite Marathon Athletes in Official Events. American Journal of Sports Science and Medicine. 2024; 12(1):1-6. doi: 10.12691/AJSSM-12-1-1

Abstract

Negative splitting (i.e., finishing the race faster) is a tactic commonly employed by elite marathon athletes, even though research supporting the strategy is scarce. The presence of pacers allows the main runner to run behind a formation, preserving energy. Our aim is to show that, in the presence of pacers, the most efficient pacing strategy is positive splitting. We evaluated the performance of an elite marathon runner from an energetic standpoint, including drag values obtained through Computational Fluid Dynamics (CFD). In varying simulations for different pacing strategies, the energy for both the main runner and his pacer were conserved and the total race time was calculated. In order to achieve minimum race time, the main runner must start the race faster and run behind the pacers, and when the pacers drop out, finish the race slower. Optimal race times are obtained when the protected phase is run 2.4 to 2.6% faster than the unprotected phase. Our results provide strong evidence that positive splitting is indeed the best pacing strategy when at least one pacer is present, causing significant time savings in official marathon events.

Keywords

drafting, pacing, marathon, CFD, world record

Copyright

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

References

[1]	Abbiss, C. R.; Laursen, P. B. Describing and Understanding Pacing Strategies during Athletic Competition. Sports Med 2008, 38 (3), 239–252.
[2]	Díaz, J. J.; Fernández-Ozcorta, E. J.; Santos-Concejero, J. The Influence of Pacing Strategy on Marathon World Records. European Journal of Sport Science 2018, 18 (6), 781–786.
[3]	Race Running: Choosing Between Even, Positive, and Negative Splits. Fitpage. https://fitpage.in/race-running-choosing-between-even-positive-and-negative-splits/ (accessed 2023-10-26).
[4]	Results Archive. BMW BERLIN-MARATHON. https://www.bmw-berlin-marathon.com/en/impressions/statistics-and-history/results-archive/ (accessed 2023-11-14).
[5]	Marathon pacing strategies: Is negative splitting really the holy grail?. Stats & Data Science Views. https://www.statisticsviews.com/article/marathon-pacing-strategies-is-negative-splitting-really-the-holy-grail/ (accessed 2023-10-26).
[6]	Edwards, A. G.; Byrnes, W. C. Aerodynamic Characteristics as Determinants of the Drafting Effect in Cycling. Medicine & Science in Sports & Exercise 2007, 39 (1), 170.
[7]	Blocken, B.; Toparlar, Y.; van Druenen, T.; Andrianne, T. Aerodynamic Drag in Cycling Team Time Trials. Journal of Wind Engineering and Industrial Aerodynamics 2018, 182, 128–145.
[8]	Malizia, F.; Blocken, B. Bicycle Aerodynamics: History, State-of-the-Art and Future Perspectives. Journal of Wind Engineering and Industrial Aerodynamics 2020, 200, 104134.
[9]	Blocken, B.; Defraeye, T.; Koninckx, E.; Carmeliet, J.; Hespel, P. CFD Simulations of the Aerodynamic Drag of Two Drafting Cyclists. Computers & Fluids 2013, 71, 435–445.
[10]	Belloli, M.; Giappino, S.; Robustelli, F.; Somaschini, C. Drafting Effect in Cycling: Investigation by Wind Tunnel Tests. Procedia Engineering 2016, 147, 38–43.
[11]	Katz, J. Race Car Aerodynamics: Designing for Speed, 2nd ed. edition; Bentley Publishers: Cambridge, MA, USA, 1996.
[12]	Romberg, G. F.; Chianese, F.; Lajoie, R. G. Aerodynamics of Race Cars in Drafting and Passing Situations; 1971; p 710213.
[13]	Rundell, K. W. Effects of Drafting during Short-Track Speed Skating. Medicine & Science in Sports & Exercise 1996, 28 (6), 765.
[14]	Gray, G. L.; Matheson, G. O.; McKenzie, D. C. The Metabolic Cost of Two Kayaking Techniques. Int J Sports Med 1995, 16 (04), 250–254.
[15]	Bilodeau, B.; Roy, B.; Boulay, M. R. Effect of Drafting on Heart Rate in Cross-Country Skiing. Medicine & Science in Sports & Exercise 1994, 26 (5), 637.
[16]	Chatard, J.-C.; Chollet, D.; Millet, G. Performance and Drag during Drafting Swimming in Highly Trained Triathletes. Medicine & Science in Sports & Exercise 1998, 30 (8), 1276.
[17]	Chollet, D.; Hue, O.; Auclair, F.; Millet, G.; Chatard, J. C. The Effects of Drafting on Stroking Variations during Swimming in Elite Male Triathletes. Eur J Appl Physiol 2000, 82 (5), 413–417.
[18]	Schickhofer, L.; Hanson, H. Aerodynamic Effects and Performance Improvements of Running in Drafting Formations. Journal of Biomechanics 2021, 122, 110457.
[19]	Polidori, G.; Legrand, F.; Bogard, F.; Madaci, F.; Beaumont, F. Numerical Investigation of the Impact of Kenenisa Bekele’s Cooperative Drafting Strategy on Its Running Power during the 2019 Berlin Marathon. Journal of Biomechanics 2020, 107, 109854.
[20]	The sub 2-hour official marathon is possible: developing a drafting strategy for a historic breakthrough in sports.
[21]	Fernandes, G. D.; Maldonado, V. The Sub 2-Hour Marathon Is at Hand: How Kelvin Kiptum Can Use Drafting to Improve His Impressive World Record. Preprints October 25, 2023.
[22]	FUKUNAGA, T.; MATSUO, A.; YUASA, K.; FUJIMATSU, H.; ASAHINA, K. Effect of Running Velocity on External Mechanical Power Output. Ergonomics 1980, 23 (2), 123–136.
[23]	Cavagna, G. A.; Kaneko, M. Mechanical Work and Efficiency in Level Walking and Running. J Physiol 1977, 268 (2), 467–481.
[24]	Eliud Kipchoge. Wikipedia; 2023.
[25]	LIVE: BERLIN MARATHON 2022 | ELIUD KIPCHOGE; 2022. https://www.youtube.com/watch?v=DpfZ_GXji6w (accessed 2023-07-25).