Understanding the Importance of Drag Coefficient Assessment for a Deeper Insight into the Hydrodynamic Profile of Swimmers

Overview

Journal J Hum Kinet

Publisher Termedia

Date 2024 May 13

PMID 38736602

Authors

Jorge E Morais

Daniel A Marinho

Raul F Bartolomeu

Tiago M Barbosa

Affiliations

Soon will be listed here.

Abstract

The main objective of this study was to confirm that the passive drag coefficient is less dependent on swimming speed than the passive drag, Froude, and Reynolds numbers, even as swimming speed increases. The sample consisted of 12 young proficient non-competitive swimmers (seven males and five females: 20.4 ± 1.9 years). Passive drag was measured with a low-voltage isokinetic engine at 1.2, 1.4, 1.6 and 1.8 m/s. The frontal surface area was measured using digital photogrammetry. Passive drag showed significant differences with a strong effect size over the four towing speeds measured (F = 116.84, p < 0.001, η = 0.91) with a quadratic relationship with speed. The Froude and Reynolds numbers had similar trends, but with linear relationships. Conversely, the passive drag coefficient showed non-significant differences across the four towing speeds (F = 3.50, p = 0.062, η = 0.33). This strongly suggests that the passive drag coefficient should be the variable of choice for monitoring the hydrodynamic profile of swimmers rather than the absolute value of passive drag.

References

Morais J, Marinho D, Arellano R, Barbosa T . Start and turn performances of elite sprinters at the 2016 European Championships in swimming. Sports Biomech. 2018; 18(1):100-114. DOI: 10.1080/14763141.2018.1435713. View

Morais J, Marques M, Rodriguez-Rosell D, Barbosa T, Marinho D . Relationship between thrust, anthropometrics, and dry-land strength in a national junior swimming team. Phys Sportsmed. 2019; 48(3):304-311. DOI: 10.1080/00913847.2019.1693240. View

Silva A, Rouboa A, Moreira A, Reis V, Alves F, Vilas-Boas J . Analysis of drafting effects in swimming using computational fluid dynamics. J Sports Sci Med. 2013; 7(1):60-6. PMC: 3763353. View

Formosa D, Toussaint H, Mason B, Burkett B . Comparative analysis of active drag using the MAD system and an assisted towing method in front crawl swimming. J Appl Biomech. 2012; 28(6):746-50. DOI: 10.1123/jab.28.6.746. View

Narita K, Nakashima M, Takagi H . Developing a methodology for estimating the drag in front-crawl swimming at various velocities. J Biomech. 2017; 54:123-128. DOI: 10.1016/j.jbiomech.2017.01.037. View

Morais J, Costa M, Mejias E, Marinho D, Silva A, Barbosa T . Morphometric study for estimation and validation of trunk transverse surface area to assess human drag force on water. J Hum Kinet. 2013; 28:5-13. PMC: 3592108. DOI: 10.2478/v10078-011-0017-x. View

Chatard J, Lavoie J, Bourgoin B, Lacour J . The contribution of passive drag as a determinant of swimming performance. Int J Sports Med. 1990; 11(5):367-72. DOI: 10.1055/s-2007-1024820. View

Zamparo P, Gatta G, Pendergast D, Capelli C . Active and passive drag: the role of trunk incline. Eur J Appl Physiol. 2009; 106(2):195-205. DOI: 10.1007/s00421-009-1007-8. View

Barbosa T, Costa M, Morais J, Morouco P, Moreira M, Garrido N . Characterization of speed fluctuation and drag force in young swimmers: a gender comparison. Hum Mov Sci. 2013; 32(6):1214-25. DOI: 10.1016/j.humov.2012.07.009. View

10.

Toussaint H, Roos P, Kolmogorov S . The determination of drag in front crawl swimming. J Biomech. 2004; 37(11):1655-63. DOI: 10.1016/j.jbiomech.2004.02.020. View

11.

Kuberski M, Polak A, Szoltys B, Markowski K, Zarzeczny R . Associations Between Selected Biological Features and Absolute and Relative Swimming Performance of Prepubescent Boys Over a 3-Year Swimming Training Program: A Longitudinal Study. J Hum Kinet. 2022; 83:143-153. PMC: 9465769. DOI: 10.2478/hukin-2022-0056. View

12.

Morais J, Saavedra J, Costa M, Silva A, Marinho D, Barbosa T . Tracking young talented swimmers: follow-up of performance and its biomechanical determinant factors. Acta Bioeng Biomech. 2013; 15(3):129-38. View

13.

Pendergast D, Mollendorf J, Zamparo P, Termin 2nd A, Bushnell D, Paschke D . The influence of drag on human locomotion in water. Undersea Hyperb Med. 2005; 32(1):45-57. View

14.

Kolmogorov S, Duplishcheva O . Active drag, useful mechanical power output and hydrodynamic force coefficient in different swimming strokes at maximal velocity. J Biomech. 1992; 25(3):311-8. DOI: 10.1016/0021-9290(92)90028-y. View

15.

Morais J, Barbosa T, Garrido N, Cirilo-Sousa M, Silva A, Marinho D . Agreement between Different Methods to Measure the Active Drag Coefficient in Front-Crawl Swimming. J Hum Kinet. 2023; 86:41-49. PMC: 10170550. DOI: 10.5114/jhk/159605. View

16.

Neiva H, Fernandes R, Cardoso R, Marinho D, Abraldes J . Monitoring Master Swimmers' Performance and Active Drag Evolution along a Training Mesocycle. Int J Environ Res Public Health. 2021; 18(7). PMC: 8038111. DOI: 10.3390/ijerph18073569. View

17.

Arellano R, Ruiz-Navarro J, Barbosa T, Lopez-Contreras G, Morales-Ortiz E, Gay A . Are the 50 m Race Segments Changed From Heats to Finals at the 2021 European Swimming Championships?. Front Physiol. 2022; 13:797367. PMC: 9326221. DOI: 10.3389/fphys.2022.797367. View

18.

Chatard J, Bourgoin B, Lacour J . Passive drag is still a good evaluator of swimming aptitude. Eur J Appl Physiol Occup Physiol. 1990; 59(6):399-404. DOI: 10.1007/BF02388619. View

19.

McKay A, Stellingwerff T, Smith E, Martin D, Mujika I, Goosey-Tolfrey V . Defining Training and Performance Caliber: A Participant Classification Framework. Int J Sports Physiol Perform. 2021; 17(2):317-331. DOI: 10.1123/ijspp.2021-0451. View

20.

Gatta G, Cortesi M, Zamparo P . The Relationship between Power Generated by Thrust and Power to Overcome Drag in Elite Short Distance Swimmers. PLoS One. 2016; 11(9):e0162387. PMC: 5031421. DOI: 10.1371/journal.pone.0162387. View