The Comparison of Center of Pressure to Center of Mass during Sideward Cutting Manoeuvre among the Male Elites of Karatecas with and without Genu Varum

Document Type : Original Article

Authors

1 Master of Sport Biomechanics, Faculty of Physical Education and Sport Sciences, Kharazmi University of Teheran, Teheran, Iran

2 professor of Sport Biomechanics, Faculty of Physical Education and Sport Sciences, Kharazmi University of Teheran, Teheran, Iran

Abstract

Purpose:
Since impairment in body alignment affects dynamic stability during sport movements and skills, the purpose of this study was to compare center of pressure to center of mass changes during sideward cutting in the elite karatecas with and without genu varum.
Method:
Twenty elite male karate athlete (ten genu varum and 10 healthy control individuals) participated in this semi-experimental study. Center of pressure changes to center of mass was calculated during sideward cutting.
Results:
The results showed that center of pressure to center of mass changes in medial- lateral direction in dominant (p=0.024) and non-dominant (p=0.004) limb in genu varum group was significantly higher than normal group. However, there was not a significant difference in anterior- posterior direction between groups (p≥0.05). The difference between dominant and non-dominant limbs (cutting manoeuvre direction) was not significant in neither anterior- posterior and medial- lateral components (p≥0.05).
Conclusion:
According to results of present study, an increase in genuvarum could be considered as an effective factor on center of pressure to center of mass changes during sideward cutting. 

Keywords

Main Subjects

References

  1. Dadgar H, Sahebazamani M, Noraei T, Sharifian E. Relationship between Q angle and non-contact injuries of lower extremity in men Karatekas. JSMED 2012; 3: 83-97. [Persian]
  2. Beneke R, Beyer T, Jachner Ch, Erasmus J, Hutler M. Energetic in karate. Journal Applied Physics 2004; 92(4-5): 518-23.
  3. Alizadeh MH, Gheytasi M. Fandamental Concept of Corrective Exercise. Tehran. Institute of Physical Education and Sports Science 2012. [Persian]
  4. Stief F, Bohma H, Schwirtz A, Dussa CU, Doderlein L. Dynamic loading of the knee and hip joint and compensatory strategies in children and adolescents with varus mal-alignment. Gait & Posture 2011; 33: 490-5.
  5. Donell S. Patellofemoral dysfunction – extensor mechanism mala-alignment. Orthopedic and Trauma, Formerly Current Orthopedics 2006; 20(2): 103-11.
  6. Probst MM, Fletcher R, Seelig DS. A comparison of lower body flexibility, strength and knee stability between karate and active control. Journal of Strength and Conditioning Research 2007; 21(2): 451-5.
  7. Lynch SA, Renstrom PA. Treatment of acute lateral ankle ligament rupture in the athlete. Conservative versus surgical treatment. Sports Medicine 1999; 27(1): 61-71.
  8. Pollard CD, Heiderscheit BC, van Emmerik REA, Hamill J. Gender differences in lower extremity coupling variability during an unanticipated cutting maneuver. Journal of Applied Biomechanics 2005; 21(2): 143-52.
  9. Boden B, Dean G, Feagin J, et al. Mechanisms of anterior cruciate ligament injury. Orthopedics 2000; 23: 573-8.
  10. Queen R, Haynes B, Hardaker W, Garrett W. Forefoot loading during 3 athletic tasks. American Journal of Sports Medicine 2007; 35: 630–6.
  11. Wright IC, Neptune RR, van den Bogert AJ, Nigg BM. The influence of foot positioning on ankle sprains. Journal of Biomechanics 2000; 33(5): 513-19.
  12. Besier TF, Lloyd DG, Cochrane JL, Ackland TR. External loading of the knee joint during running and cutting maneuvers. Medicine and Science in Sports and Exercise 2001; 33(7): 1168-75.
  13. Landry SC, McKean KA, Hubley-Kozey CL, Stanish WD, Deluzio KJ. Neuromuscular and lower limb biomechanical differences exist between male and female elite adolescent soccer players during an unanticipated side-cut maneuver. American Journal of Sports Medicine 2007; 35(11): 1888-900.
  14. Chappell JD, Yu B, Kirkendall DT, et al. A comparison of knee kinetics between male and female recreational athletes in stop-jump tasks. American Journal of Sports Medicine 2002; 30: 261-7.
  15. Lafonda D, Duarteb M, Prince F. Comparison of three methods to estimate the center of mass during balance assessment. Journal of Biomechanics 2004; 37: 1421-6.
  16. Chang A, et al. Hip abduction moment and protection against medial tibiofemoral osteoarthritis progression. Arthritis & Rheumatism 2005; 52 (11): 3515-19.
  17. Samaei A, Bakhtiary A, Elham F, Rezasoltani A. Effects of genu varum deformity on postural stability. International Journal of Sports Medicine 2012; 33(6): 469-73. [Persian]
  18. Panah-abadi M, Aghayari A, Salari Esker F, Anbarian M. The effect of genu varum deformity on balance control following postural perturbation in adolescent girls. Scientific Journal of Kurdistan University of Medical Sciences 2013; 18(2): 67-76. [Persian]
  19. Havens KL, Sigward SM.  Joint and segmental mechanics differ between cutting maneuvers in skilled athletes. Gait & Posture 2015; 41: 33-8.
  20. Llana-Belloch S, Brizuela G, Rezsoriano PP, Ana C. A-Belenguer G, Crespo M. Supination control increases perfor mance in sideward cutting movements in tennis. Sports Biomechanics 2013; 2(1): 38-47.
  21. Suzuki Y, Michiyoshi AE, Takenaka S, Fuji N. Compar ison of suppor t leg kinetics between side-step and cross-step cutting techniques. Sports Biomechanics 2014; 13(2): 144-53.
  22. Lohmander LS, Ostenberg A, Englund M, et al. High prevalence of knee osteoarthritis, pain, and functional limitations in female soccer players twelve years after anterior cruciate ligament injury. Arthritis Rheum 2004; 50: 3145-52. 
  23. Mache MA, Hoffman MA, Hannigan K, et al. Effects of decision making on landing mechanics as a function of task and sex. Clinical Biomechanics 2013; 28: 104-9.
  24. Malinzak RA, Colby SM, Kirkendall DT, et al. A comparison of knee joint motion patterns between men and women in selected athletic tasks. Clinical Biomechanics 2001; 16: 438-45.
  25. Markolf KL, Burchfield DM, Shapiro MM, et al. Combined knee loading states that generate high anterior cruciate ligament forces. Journal Orthopedics Research 1995; 13: 930-35.
  26. Kim JH, Lee KK, Kong SJ, Keun OA, Jeong JH, Lee YS. Effect of Anticipation on Lower Extremity Biomechanics during Side- and Cross-Cutting Maneuvers in Young Soccer Players. The American Journal of Sports Medicine 2014; 42(8): 1985-92. 

 

Journal of Paramedical Sciences & Rehabilitation
Volume 5, Issue 4
January 2017
Pages 43-49

Files

Share

How to cite

Statistics