Relationship between pitching mechanics and biomechanical efficiency of college baseball pitchers
Abstract
Biomechanical efficiency of baseball pitch is considered to be a better indicator for evaluating pitching skills. Since there is a relationship between elbow varus and elbow mechanics during the arm cocking phase, we attempted to include this variable in the multiple regression analysis to improve the understanding of the biomechanical efficiency of baseball pitching. The fastest pitching of 68 college baseball pitchers was used for analysis. The regression results showed that maximum elbow flexion angle (β: −2.615, p: 0.003), shoulder external rotation angle at the moment of maximum external rotation (MER) (β: 2.881, p: 0.004), maximum trunk rotation velocity (β: −0.333, p: 0.001), trunk rotation angle at the moment of stride foot contact (SFC) (β: −2.031, p:0.006), time between maximum pelvic rotation velocity and maximum trunk rotation velocity (β: 1.238, p: 0.023), and shoulder abduction angle at the moment of SFC (β: −2.048, p: 0.033) correlated with biomechanical efficiency and explained 45% of the variance in biomechanical efficiency. Therefore, further improvements in elbow mechanics during the arm cocking phase, based on improvements in early pitching mechanics, may help to increase pitching velocity per unit of elbow varus torque.
References
1. Wasserman, E.B.; Sauers, E.L.; Register-Mihalik, J.K.; Pierpoint, L.A.; Currie, D.W.; Knowles, S.B.; Dompier, T.P.; Comstock, R.D.; Marshall, S.W.; Kerr, Z.Y. The First Decade of Web-Based Sports Injury Surveillance: Descriptive Epidemiology of Injuries in US High School Boys’ Baseball (2005-2006 Through 2013-2014) and National Collegiate Athletic Association Men’s Baseball (2004-2005 Through 2013-2014). J Athl Train 2019, 54, 198-211, doi:10.4085/1062-6050-239-17.
2. Dick, R.; Sauers, E.L.; Agel, J.; Keuter, G.; Marshall, S.W.; McCarty, K.; McFarland, E. Descriptive epidemiology of collegiate men’s baseball injuries: National Collegiate Athletic Association Injury Surveillance System, 1988-1989 through 2003-2004. J Athl Train 2007, 42, 183-193.
3. Li, X.; Zhou, H.; Williams, P.; Steele, J.J.; Nguyen, J.; Jager, M.; Coleman, S. The epidemiology of single season musculoskeletal injuries in professional baseball. Orthop Rev (Pavia) 2013, 5, e3, doi:10.4081/or.2013.e3.
4. Solomito, M.J.; Garibay, E.J.; Woods, J.R.; Ounpuu, S.; Nissen, C.W. Lateral trunk lean in pitchers affects both ball velocity and upper extremity joint moments. Am J Sports Med 2015, 43, 1235-1240, doi:10.1177/0363546515574060.
5. Davis, J.T.; Limpisvasti, O.; Fluhme, D.; Mohr, K.J.; Yocum, L.A.; Elattrache, N.S.; Jobe, F.W. The effect of pitching biomechanics on the upper extremity in youth and adolescent baseball pitchers. Am J Sports Med 2009, 37, 1484-1491, doi:10.1177/0363546509340226.
6. Werner, S.L.; Fleisig, G.S.; Dillman, C.J.; Andrews, J.R. Biomechanics of the elbow during baseball pitching. J Orthop Sports Phys Ther 1993, 17, 274-278, doi:10.2519/jospt.1993.17.6.274.
7. Fleisig, G.S.; Escamilla, R.F. Biomechanics of the elbow in the throwing athlete. Operative Techniques in Sports Medicine 1996, 4, 62-68, doi:10.1016/s1060-1872(96)80050-5.
8. Cain, E.L., Jr.; Dugas, J.R.; Wolf, R.S.; Andrews, J.R. Elbow injuries in throwing athletes: a current concepts review. Am J Sports Med 2003, 31, 621-635, doi:10.1177/03635465030310042601.
9. Diffendaffer AZ, Bagwell MS, Fleisig GS, et al. The Clinician’s Guide to Baseball Pitching Biomechanics. Sports Health. 2023;15(2):274-281. doi:10.1177/19417381221078537.
10. Solomito, M.J.; Garibay, E.J.; Cohen, A.; Nissen, C.W. Lead knee flexion angle is associated with both ball velocity and upper extremity joint moments in collegiate baseball pitchers. Sports Biomech 2022, 1-11, doi:10.1080/14763141.2022.2046143.
11. Stodden, D.F.; Fleisig, G.S.; McLean, S.P.; Andrews, J.R. Relationship of biomechanical factors to baseball pitching velocity: within pitcher variation. J Appl Biomech 2005, 21, 44-56, doi:10.1123/jab.21.1.44.
12. Nicholson, K.F.; Hulburt, T.C.; Beck, E.C.; Waterman, B.R.; Bullock, G.S. The relationship between pitch velocity and shoulder distraction force and elbow valgus torque in collegiate and high school pitchers. J Shoulder Elbow Surg 2020, 29, 2661-2667, doi:10.1016/j.jse.2020.04.046.
13. Crotin, R.L.; Slowik, J.S.; Brewer, G.; Cain, E.L.; Fleisig, G.S. Determinants of Biomechanical Efficiency in Collegiate and Professional Baseball Pitchers. The American Journal of Sports Medicine 2022, 50, 3374-3380, doi:10.1177/03635465221119194.
14. Roupa, I., da Silva, M.R., Marques, F. et al. On the Modeling of Biomechanical Systems for Human Movement Analysis: A Narrative Review. Arch Computat Methods Eng 29, 4915–4958 (2022). https://doi.org/10.1007/s11831-022-09757-0.
15. Howenstein, J.; Kipp, K.; Sabick, M.B. Energy Flow Analysis to Investigate Youth Pitching Velocity and Efficiency. Med Sci Sports Exerc 2019, 51, 523-531, doi:10.1249/MSS.0000000000001813.
16. Urbin, M.A.; Fleisig, G.S.; Abebe, A.; Andrews, J.R. Associations Between Timing in the Baseball Pitch and Shoulder Kinetics, Elbow Kinetics, and Ball Speed. The American Journal of Sports Medicine 2013, 41, 336-342, doi:10.1177/0363546512467952.
17. Aguinaldo, A.L.; Chambers, H. Correlation of throwing mechanics with elbow valgus load in adult baseball pitchers. Am J Sports Med 2009, 37, 2043-2048, doi:10.1177/0363546509336721.
18. Werner, S.L.; Murray, T.A.; Hawkins, R.J.; Gill, T.J. Relationship between throwing mechanics and elbow valgus in professional baseball pitchers. J Shoulder Elbow Surg 2002, 11, 151-155, doi:10.1067/mse.2002.121481.
19. Naito, K.; Maruyama, T. Contributions of the muscular torques and motion-dependent torques to generate rapid elbow extension during overhand baseball pitching. Sports Engineering 2008, 11, 47-56, doi:10.1007/s12283-008-0002-3.
20. Fleisig, G.S.; Andrews, J.R.; Dillman, C.J.; Escamilla, R.F. Kinetics of baseball pitching with implications about injury mechanisms. Am J Sports Med 1995, 23, 233-239, doi:10.1177/036354659502300218.
21. Febrer-Nafría, M., Nasr, A., Ezati, M. et al. Predictive multibody dynamic simulation of human neuromusculoskeletal systems: a review. Multibody Syst Dyn 58, 299–339 (2023). https://doi.org/10.1007/s11044-022-09852-x
22. Wasserberger KW, B.A., Besky DM, Jones BR, Boddy KJ. The OpenBiomechanics Project: The open source initiative for anonymized, elite-level athletic motion capture data. 2022.
23. Sabick, M.B.; Torry, M.R.; Kim, Y.K.; Hawkins, R.J. Humeral torque in professional baseball pitchers. Am J Sports Med 2004, 32, 892-898, doi:10.1177/0363546503259354.
24. Matsuo, T.; Fleisig, G.S. Influence of shoulder abduction and lateral trunk tilt on peak elbow varus torque for college baseball pitchers during simulated pitching. J Appl Biomech 2006, 22, 93-102, doi:10.1123/jab.22.2.93.
25. Bell, A.L.; Brand, R.A.; Pedersen, D.R. Prediction of hip joint centre location from external landmarks. Hum Movement Sci 1989, 8, 3-16, doi:10.1016/0167-9457(89)90020-1.
26. Wu, G.; van der Helm, F.C.; Veeger, H.E.; Makhsous, M.; Van Roy, P.; Anglin, C.; Nagels, J.; Karduna, A.R.; McQuade, K.; Wang, X.; et al. ISB recommendation on definitions of joint coordinate systems of various joints for the reporting of human joint motion--Part II: shoulder, elbow, wrist and hand. J Biomech 2005, 38, 981-992, doi:10.1016/j.jbiomech.2004.05.042.
27. Fleisig, G.S.; Escamilla, R.F.; Andrews, J.R.; Matsuo, T.; Satterwhite, Y.; Barrentine, S.W. Kinematic and Kinetic Comparison between Baseball Pitching and Football Passing. Journal of Applied Biomechanics 1996, 12, 207-224, doi:10.1123/jab.12.2.207.
28. Oyama, S.; Yu, B.; Blackburn, J.T.; Padua, D.A.; Li, L.; Myers, J.B. Effect of excessive contralateral trunk tilt on pitching biomechanics and performance in high school baseball pitchers. Am J Sports Med 2013, 41, 2430-2438, doi:10.1177/0363546513496547.
29. Wasserberger, K.W.; Giordano, K.A.; de Swart, A.; Barfield, J.W.; Oliver, G.D. Energy generation, absorption, and transfer at the shoulder and elbow in youth baseball pitchers. Sports Biomech 2021, 1-16, doi:10.1080/14763141.2021.1933158.
30. Milewski, M.D.; Ounpuu, S.; Solomito, M.; Westwell, M.; Nissen, C.W. Adolescent baseball pitching technique: lower extremity biomechanical analysis. J Appl Biomech 2012, 28, 491-501, doi:10.1123/jab.28.5.491.
31. Tanaka, Y.; Ishida, T.; Ino, T.; Suzumori, Y.; Samukawa, M.; Kasahara, S.; Tohyama, H. The effects of relative trunk rotation velocity on ball speed and elbow and shoulder joint torques during baseball pitching. Sports Biomech 2022, 1-13, doi:10.1080/14763141.2022.2129431.
32. Slowik, J.S.; Diffendaffer, A.Z.; Crotin, R.L.; Stewart, M.S.; Hart, K.; Fleisig, G.S. Biomechanical effects of foot placement during pitching. Sports Biomech 2021, 1-10, doi:10.1080/14763141.2021.1898668.
33. Fleisig, G.S.; Diffendaffer, A.Z.; Ivey, B.; Aune, K.T. Do baseball pitchers improve mechanics after biomechanical evaluations? Sports Biomech 2018, 17, 314-321, doi:10.1080/14763141.2017.1340508.
34. Solomito, M.J.; Cohen, A.D.; Garibay, E.J. Influence of stride length on upper extremity joint moments and ball velocity in collegiate baseball pitchers. Sports Biomech 2023, 22, 1460-1469, doi:10.1080/14763141.2020.1809698.
35. Dowling, B.; Manzi, J.E.; Raab, G.; Coladonato, C.; Dines, J.S.; Fleisig, G.S. The relationship among lead knee extension, fastball velocity and elbow torque in professional baseball pitchers. Sports Biomech 2022, 1-11, doi:10.1080/14763141.2022.2050801.
36. Wight, J.; Richards, J.; Hall, S. Influence of pelvis rotation styles on baseball pitching mechanics. Sports Biomech 2004, 3, 67-83, doi:10.1080/14763140408522831.
37. Oyama, S.; Yu, B.; Blackburn, J.T.; Padua, D.A.; Li, L.; Myers, J.B. Improper trunk rotation sequence is associated with increased maximal shoulder external rotation angle and shoulder joint force in high school baseball pitchers. The American Journal of Sports Medicine 2014, 42, 2089-2094.
38. Howenstein, J.; Kipp, K.; Sabick, M. Peak horizontal ground reaction forces and impulse correlate with segmental energy flow in youth baseball pitchers. J Biomech 2020, 108, 109909, doi:10.1016/j.jbiomech.2020.109909.
39. Liu, J.M.; Knowlton, C.; Gauthier, M.; Tropp, Z.; Verma, N.; Nicholson, G.; Romeo, A.; Zaferiou, A. Roles of each leg in impulse generation in professional baseball pitchers: preliminary findings uncover the contribution of the back leg towards whole-body rotation. Sports Biomech 2022, 1-16, doi:10.1080/14763141.2022.2108490.
40. Luera, M.J.; Dowling, B.; Muddle, T.W.D.; Jenkins, N.D.M. Differences in Rotational Kinetics and Kinematics for Professional Baseball Pitchers With Higher Versus Lower Pitch Velocities. Journal of Applied Biomechanics 2020, 36, 68-75, doi:10.1123/jab.2019-0235.
41. Crotin, R.L.; Yanai, T.; Chalmers, P.; Smale, K.B.; Erickson, B.J.; Kaneoka, K.; Ishii, M. Analysis of Injuries and Pitching Performance Between Major League Baseball and Nippon Professional Baseball: A 2-Team Comparison Between 2015 to 2019. Orthop J Sports Med 2021, 9, 23259671211008810, doi:10.1177/23259671211008810.
42. Fortenbaugh, D.; Fleisig, G.S.; Andrews, J.R. Baseball pitching biomechanics in relation to injury risk and performance. Sports Health 2009, 1, 314-320, doi:10.1177/1941738109338546.
43. Tanaka, H.; Hayashi, T.; Inui, H.; Muto, T.; Ninomiya, H.; Nakamura, Y.; Yoshiya, S.; Nobuhara, K. Estimation of Shoulder Behavior From the Viewpoint of Minimized Shoulder Joint Load Among Adolescent Baseball Pitchers. Am J Sports Med 2018, 46, 3007-3013, doi:10.1177/0363546518789626.
44. Putnam, C.A. Sequential motions of body segments in striking and throwing skills: descriptions and explanations. J Biomech 1993, 26 Suppl 1, 125-135, doi:10.1016/0021-9290(93)90084-r.
45. Marshall, R.N.; Elliott, B.C. Long-axis rotation: the missing link in proximal-to-distal segmental sequencing. J Sports Sci 2000, 18, 247-254, doi:10.1080/026404100364983.
46. Dines, J.S.; Frank, J.B.; Akerman, M.; Yocum, L.A. Glenohumeral internal rotation deficits in baseball players with ulnar collateral ligament insufficiency. Am J Sports Med 2009, 37, 566-570, doi:10.1177/0363546508326712.
47. Albright, J.A.; Jokl, P.; Shaw, R.; Albright, J.P. Clinical study of baseball pitchers: correlation of injury to the throwing arm with method of delivery. Am J Sports Med 1978, 6, 15-21, doi:10.1177/036354657800600104.
48. Aguinaldo, A.L.; Escamilla, R.F. Induced power analysis of sequential body motion and elbow valgus load during baseball pitching. Sports Biomech 2022, 21, 824-836, doi:10.1080/14763141.2019.1696881.
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