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Research Papers

The Role of the Hand During Freestyle Swimming

[+] Author and Article Information
Raymond C. Z. Cohen

Digital Productivity Flagship,
CSIRO,
Private Bag 33,
Clayton South 3169, VIC, Australia
e-mail: Raymond.Cohen@csiro.au

Paul W. Cleary

Digital Productivity Flagship,
CSIRO,
Private Bag 33,
Clayton South 3169, VIC, Australia
e-mail: Paul.Cleary@csiro.au

Bruce R. Mason

Aquatic Testing, Training and Research Unit,
Australian Institute of Sport,
Leverrier Street,
Bruce 2617, ACT, Australia
e-mail: Bruce.Mason@ausport.gov.au

David L. Pease

Aquatic Testing, Training and Research Unit,
Australian Institute of Sport,
Leverrier Street,
Bruce 2617, ACT, Australia
e-mail: Dave.Pease@ausport.gov.au

1Corresponding author.

Manuscript received December 1, 2014; final manuscript received August 14, 2015; published online October 1, 2015. Assoc. Editor: Francis Loth.

J Biomech Eng 137(11), 111007 (Oct 01, 2015) (10 pages) Paper No: BIO-14-1598; doi: 10.1115/1.4031586 History: Received December 01, 2014; Revised August 14, 2015

The connections between swimming technique and the fluid dynamical interactions they generate are important for assisting performance improvement. Computational fluid dynamics (CFD) modeling provides a controlled and unobtrusive way for understanding the fundamentals of swimming. A coupled biomechanical–smoothed particle hydrodynamics (SPH) fluid model is used to analyze the thrust and drag generation of a freestyle swimmer. The swimmer model was generated using a three-dimensional laser body scan of the athlete and digitization of multi-angle video footage. Two large distinct peaks in net streamwise thrust are found during the stroke, which coincide with the underwater arm strokes. The hand motions generate vortical structures that travel along the body toward the kicking legs and the hands are shown to produce thrust using both lift and drag. These findings advance understanding of the freestyle stroke and may be used to improve athlete technique.

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References

Wei, T. , Mark, R. , and Hutchison, S. , 2014, “ The Fluid Dynamics of Competitive Swimming,” Annu. Rev. Fluid Mech., 46(1), pp. 547–565. [CrossRef]
Bucher, W. , 1975, “ The Influence of the Leg Kick and the Arm Stroke on the Total Speed During the Crawl Stroke,” Swimming II: Second International Symposium on Biomechanics in Swimming, L. Lewillie , and J. P. Clarys , eds., University Park Press, Baltimore, MD, pp. 180–187.
Hollander, A. P. , De Groot, G. , van Ingen Schenau, G. J. , Kahman, R. , and Toussaint, H. M. , 1988, “ Contribution of the Legs to Propulsion in Front Crawl Swimming,” Swimming Science V, B. Ungerechts , K. Wilke , and K. Reischle , eds., Human Kinetics, Champaign, IL, pp. 39–44.
Deschodt, V. J. , Arsac, L. M. , and Rouard, A. H. , 1999, “ Relative Contribution of Arms and Legs in Humans to Propulsion in 25-m Sprint Front-Crawl Swimming,” Eur. J. Appl. Physiol., 80(3), pp. 192–199. [CrossRef]
Counsilman, J. E. , 1968, The Science of Swimming, Prentice-Hall, Englewood Cliffs, NJ.
Berger, M. A. M. , de Groot, G. , and Hollander, A. P. , 1995, “ Hydrodynamic Drag and Lift Forces on Human Hand/Arm Models,” J. Biomech., 28(2), pp. 125–133. [CrossRef] [PubMed]
Payton, C. J. , and Bartlett, R. M. , 1995, “ Estimating Propulsive Forces in Swimming From Three-Dimensional Kinematic Data,” J. Sports Sci., 13(6), pp. 447–454. [CrossRef] [PubMed]
Schleihauf, R. E. , 1979, “ A Hydrodynamic Analysis of Swimming Propulsion,” Swimming III, J. Terauds , and E. W. Bedingfield E.W. , eds., University Park Press, Baltimore, MD, pp. 70–109.
Bixler, B. , and Riewald, S. , 2002, “ Analysis of a Swimmer's Hand and Arm in Steady Flow Conditions Using Computational Fluid Dynamics,” J. Biomech., 35(5), pp. 713–717. [CrossRef] [PubMed]
Minetti, A. E. , Machtsiras, G. , and Masters, J. C. , 2009, “ The Optimum Finger Spacing in Human Swimming,” J. Biomech., 42(13), pp. 2188–2190. [CrossRef] [PubMed]
Marinho, D. A. , Barbosa, T. M. , Reis, V. M. , Kjendlie, P. L. , Alves, F. B. , Vilas-Boas, J. P. , Machado, L. , Silva, A. J. , and Rouboa, A. I. , 2010, “ Swimming Propulsion Forces are Enhanced by a Small Finger Spread,” J. Appl. Biomech., 26(1), pp. 87–92. [PubMed]
Marinho, D. A. , Silva, A. J. , Reis, V. M. , Barbosa, T. M. , Vilas-Boas, J. P. , Alves, F. B. , Machado, L. , and Rouboa, A. I. , 2011, “ Three-Dimensional CFD Analysis of the Hand and Forearm in Swimming,” J. Appl. Biomech., 27(1), pp. 74–80. [PubMed]
Rouboa, A. , Silva, A. , Leal, L. , Rocha, J. , and Alves, F. , 2006, “ The Effect of Swimmer's Hand/Forearm Acceleration on Propulsive Forces Generation Using Computational Fluid Dynamics,” J. Biomech., 39(7), pp. 1239–1248. [CrossRef] [PubMed]
Von Loebbecke, A. , and Mittal, R. , 2012, “ Comparative Analysis of Thrust Production for Distinct Arm-Pull Styles in Competitive Swimming,” ASME J. Biomech. Eng., 134(7), p. 074501. [CrossRef]
Bixler, B. , Pease, D. , and Fairhurst, F. , 2007, “ The Accuracy of Computational Fluid Dynamics Analysis of the Passive Drag of a Male Swimmer,” Sports Biomech., 6(1), pp. 81–98. [CrossRef] [PubMed]
Zaïdi, H. , Fohanno, S. , Taïar, R. , and Polidori, G. , 2010, “ Turbulence Model Choice for the Calculation of Drag Forces When Using the CFD Method,” J. Biomech., 43(3), pp. 405–411. [CrossRef] [PubMed]
Marinho, D. A. , Reis, V. M. , Alves, F. B. , Vilas-Boas, J. P. , Machado, L. , Silva, A. J. , and Rouboa, A. I. , 2009, “ Hydrodynamic Drag During Gliding in Swimming,” J. Appl. Biomech., 25(3), pp. 253–257. [PubMed]
Popa, C. V. , Arfaoui, A. , Fohanno, S. , Taïar, R. , and Polidori, G. , 2014, “ Influence of a Postural Change of the Swimmer's Head in Hydrodynamic Performances Using 3D CFD,” Comput. Methods Biomech. Biomed. Eng., 17(4), pp. 344–351. [CrossRef]
Lyttle, A. , and Keys, M. , 2006, “ The Application of Computational Fluid Dynamics for Technique Prescription in Underwater Kicking,” Port. J. Sport Sci., 6(2), pp. 233–235.
Von Loebbecke, A. , Mittal, R. , Mark, R. , and Hahn, J. , 2009, “ A Computational Method for Analysis of Underwater Dolphin Kick Hydrodynamics in Human Swimming,” Sports Biomech., 8(1), pp. 60–77. [CrossRef] [PubMed]
Cohen, R. C. Z. , Cleary, P. W. , and Mason, B. R. , 2012, “ Simulations of Dolphin Kick Swimming Using Smoothed Particle Hydrodynamics,” Hum. Mov. Sci., 31(3), pp. 604–619. [CrossRef] [PubMed]
Keys, M. , Lyttle, A. , Blanksby, B. A. , and Cheng, L. , 2010, “ A Full Body Computational Fluid Dynamic Analysis of the Freestyle Stroke of a Previous Sprint Freestyle World Record Holder,” XIth International Symposium for Biomechanics and Medicine in Swimming, Oslo, Norway, June 16–19, Paper No. O-075, pp. 105–107.
Cleary, P. W. , Cohen, R. C. Z. , Harrison, S. M. , Sinnott, M. D. , Prakash, M. , and Mead, S. , 2013, “ Prediction of Industrial, Biophysical and Extreme Geophysical Flows Using Particle Methods,” Eng. Comput., 30(2), pp. 157–196. [CrossRef]
Cohen, R. C. Z. , Cleary, P. W. , Harrison, S. M. , Mason, B. R. , and Pease, D. L. , 2014, “ Pitching Effects of Buoyancy During Four Competitive Swimming Strokes,” J. Appl. Biomech., 30(5), pp. 609–618. [CrossRef] [PubMed]
Monaghan, J. J. , 1994, “ Simulating Free Surface Flows With SPH,” J. Comput. Phys., 110(2), pp. 399–406. [CrossRef]
Cohen, R. C. Z. , and Cleary, P. W. , 2010, “ Computational Studies of the Locomotion of Dolphins and Sharks Using Smoothed Particle Hydrodynamics,” 6th World Congress of Biomechanics (WCB 2010), Singapore, Aug. 1–6, pp. 22–25.
Harrison, S. M. , Cohen, R. C. Z. , Cleary, P. W. , Mason, B. R. , and Pease, D. L. , 2014, “ Torque and Power About the Joints of the Arm During the Freestyle Stroke,” XII International Symposium on Biomechanics and Medicine in Swimming, Canberra, Australia, Apr. 28–May 2, pp. 349–355.
Harrison, S. M. , Cohen, R. C. Z. , Cleary, P. W. , Barris, S. , and Rose, G. , “ A Coupled Biomechanical–Smoothed Particle Hydrodynamics Model for Predicting The Loading on the Body During Elite Platform Diving,” Appl. Math. Model. (submitted).
Monaghan, J. J. , 2005, “ Smoothed Particle Hydrodynamics,” Rep. Prog. Phys., 68(8), pp. 1703–1759. [CrossRef]
Monaghan, J. J. , 2012, “ Smoothed Particle Hydrodynamics and Its Diverse Applications,” Annu. Rev. Fluid Mech., 44(1), pp. 323–346. [CrossRef]
Cleary, P. W. , Prakash, M. , Ha, J. , and Stokes, N. , 2007, “ Smooth Particle Hydrodynamics: Status and Future Potential,” Prog. Comput. Fluid Dyn., 7(2), pp. 70–90. [CrossRef]
Liu, M. B. , and Liu, G. R. , 2010, “ Smoothed Particle Hydrodynamics (SPH): An Overview and Recent Developments,” Arch. Comput. Methods Eng., 17(1), pp. 25–76. [CrossRef]
Cleary, P. W. , Ha, J. , Prakash, M. , and Nguyen, T. , 2006, “ 3D SPH Flow Predictions and Validation for High Pressure Die Casting of Automotive Components,” Appl. Math. Model., 30(11), pp. 1406–1427. [CrossRef]
Prakash, M. , Cleary, P. W. , Ha, J. , Noui-Mehidi, M. N. , Blackburn, H. , and Brooks, G. , 2007, “ Simulation of Suspension of Solids in a Liquid in a Mixing Tank Using SPH and Comparison With Physical Modelling Experiments,” Prog. Comput. Fluid Dyn. Int. J., 7(2), pp. 91–100. [CrossRef]
Robinson, M. , Cleary, P. , and Monaghan, J. , 2008, “ Analysis of Mixing in a Twin Cam Mixer Using Smoothed Particle Hydrodynamics,” AIChE J., 54(8), pp. 1987–1998. [CrossRef]
Farahani, R. J. , and Dalrymple, R. A. , 2014, “ Three-Dimensional Reversed Horseshoe Vortex Structures Under Broken Solitary Waves,” Coast. Eng., 91, pp. 261–279. [CrossRef]
López, D. , Marivela, R. , and Garrote, L. , 2010, “ Smoothed Particle Hydrodynamics Model Applied to Hydraulic Structures: A Hydraulic Jump Test Case,” J. Hydraul. Res., 48(S1), pp. 142–158. [CrossRef]
Shao, S. , 2009, “ Incompressible SPH Simulation of Water Entry of a Free-Falling Object,” Int. J. Numer. Methods Fluids, 59(1), pp. 91–115. [CrossRef]
Hieber, S. E. , and Koumoutsakos, P. , 2008, “ An Immersed Boundary Method for Smoothed Particle Hydrodynamics of Self-Propelled Swimmers,” J. Comput. Phys., 227(19), pp. 8636–8654. [CrossRef]
Cummins, S. J. , Silvester, T. B. , and Cleary, P. W. , 2012, “ Three-Dimensional Wave Impact on a Rigid Structure Using Smoothed Particle Hydrodynamics,” Int. J. Numer. Methods Fluids, 68(12), pp. 1471–1496. [CrossRef]
Monaghan, J. J. , 1995, “ Simulating Gravity Currents With SPH: III Boundary Forces,” Department of Mathematics, Monash University, Victoria, Australia, Report No. 95/11.
Rudman, M. , Cleary, P. W. , and Prakash, M. , 2009, “ Simulation of Liquid Sloshing in a Model LNG Tank Using Smoothed Particle Hydrodynamics,” Int. J. Offshore Polar Eng., 19(4), pp. 286–294.
Jeong, J. , and Hussain, F. , 1995, “ On the Identification of a Vortex,” J. Fluid Mech., 285, pp. 69–94. [CrossRef]
Toussaint, H. M. , Truijens, M. , Elzinga, M. J. , Van de Ven, A. , de Best, H. , Snabel, B. , and de Groot, G. , 2002, “ Effect of a Fast-Skin™ ‘Body’ Suit on Drag During Front Crawl Swimming,” Sports Biomech., 1(1), pp. 1–10. [CrossRef] [PubMed]
Arellano, R. , Brown, P. , Cappaert, J. , and Nelson, R. C. , 1994, “ Analysis of 50-, 100-, and 200-m Freestyle Swimmers at the 1992 Olympic Games,” J. Appl. Biomech., 10, pp. 189–199.
Hochstein, S. , and Blickhan, R. , 2011, “ Vortex Re-Capturing and Kinematics in Human Underwater Undulatory Swimming,” Hum. Mov. Sci., 30(5), pp. 998–1007. [CrossRef] [PubMed]
Pacholak, S. , Hochstein, S. , Rudert, A. , and Brücker, C. , 2014, “ Unsteady Flow Phenomena in Human Undulatory Swimming: A Numerical Approach,” Sports Biomech., 13(2), pp. 176–194. [CrossRef] [PubMed]
Vennell, R. , Pease, D. , and Wilson, B. , 2006, “ Wave Drag on Human Swimmers,” J. Biomech., 39(4), pp. 664–671. [CrossRef] [PubMed]
Marinho, D. A. , Rouboa, A. I. , Alves, F. B. , Vilas-Boas, J. P. , Machado, L. , Reis, V. M. , and Silva, A. J. , 2009, “ Hydrodynamic Analysis of Different Thumb Positions in Swimming,” J. Sports Sci. Med., 8(1), pp. 58–66. [PubMed]

Figures

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Fig. 1

(a) Laser scanned geometry of the swimmer in an anatomical pose (with blurred facial features). Multi-angle video footage of the swimmer with the animated swimmer mesh overlayed; (b) bottom-up perspective; and (c) side-on perspective taken from a camera above and below the water.

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Fig. 2

Orthogonal views of the finger trajectories in the reference frame of the swimmer

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Fig. 3

Joint speeds in the reference frame of the swimmer: (a) left arm and (b) right arm. The shaded periods correspond to when the arm is in the water and the unshaded periods are the arm recovery.

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Fig. 4

Instantaneous free surface of the fluid during the freestyle swimming simulation

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Fig. 5

Side-on view of the flow around the freestyle swimmer during the right arm pull: (a) fluid in the z = 0.1 plane colored by speed in m/s and (b) fluid in the z = 0.1 plane colored by spanwise vorticity in 1/s

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Fig. 6

Visualization of the flow around the swimmer during the right arm pull. The fluid free surface is colored semitransparent blue whilst the three-dimensional λ2 vortex structures are colored by vorticity magnitude (|ω|) in 1/s. (a) Side view and (b) frontal view from above the pool.

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Fig. 7

Net streamwise forces on the arms of the swimmer: (a) left arm and (b) right arm. The shaded periods correspond to when the hand is in the water and the unshaded periods are the arm recovery.

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Fig. 8

Trajectories of the hands in world coordinates during the freestyle simulations

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Fig. 9

Streamwise velocity of the hands in world coordinates during the freestyle simulations: (a) left hand and (b) right hand. The shaded periods correspond to when the hand is in the water and the unshaded periods are the arm recovery.

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Fig. 10

Angle (α) between the normal to the hand palms and the hand velocity (in world coordinates): (a) left hand and (b) right hand. The shaded periods correspond to when the hand is in the water and the unshaded periods are the arm recovery.

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