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The Effect of Altering Knee Position and Squat Depth on VMO : VL EMG Ratio During Squat Exercises

2015; Wiley; Volume: 21; Issue: 3 Linguagem: Inglês

10.1002/pri.1631

1471-2865

Shapour Jaberzadeh, Daniel Yeo, Maryam Zoghi,

Sports injuries and prevention

Physiotherapy Research InternationalVolume 21, Issue 3 p. 164-173 Research Article The Effect of Altering Knee Position and Squat Depth on VMO : VL EMG Ratio During Squat Exercises Shapour Jaberzadeh, Corresponding Author Shapour Jaberzadeh Department of Physiotherapy, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia Correspondence Shapour Jaberzadeh, PhD, GCHPE, Senior Lecturer, Postgraduate Coordinator. Physiotherapy, School of Primary Health Care, Faculty of Medicine, Nursing and Health Sciences, Monash University, Peninsula Campus Building B PO Box 527 Frankston, Victoria 3199, Australia. Email: [email protected]Search for more papers by this authorDaniel Yeo, Daniel Yeo Physica Devonport Physiotherapy, Devonport, AustraliaSearch for more papers by this authorMaryam Zoghi, Maryam Zoghi Department of Medicine (Royal Melbourne Hospital), The University of Melbourne, Melbourne, AustraliaSearch for more papers by this author Shapour Jaberzadeh, Corresponding Author Shapour Jaberzadeh Department of Physiotherapy, Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia Correspondence Shapour Jaberzadeh, PhD, GCHPE, Senior Lecturer, Postgraduate Coordinator. Physiotherapy, School of Primary Health Care, Faculty of Medicine, Nursing and Health Sciences, Monash University, Peninsula Campus Building B PO Box 527 Frankston, Victoria 3199, Australia. Email: [email protected]Search for more papers by this authorDaniel Yeo, Daniel Yeo Physica Devonport Physiotherapy, Devonport, AustraliaSearch for more papers by this authorMaryam Zoghi, Maryam Zoghi Department of Medicine (Royal Melbourne Hospital), The University of Melbourne, Melbourne, AustraliaSearch for more papers by this author First published: 11 May 2015 https://doi.org/10.1002/pri.1631Citations: 20Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Background Patellofemoral pain syndrome is an extremely common condition, believed to be caused by altered activation of vastus medialis obliquus (VMO), leading to maltracking of the patella. Aim This study aimed to investigate the effect of altering knee movement and squat depth on the ratio of VMO and vastus lateralis (VMO : VL) during squat exercises. Method Eighteen (7 male and 11 female) healthy, asymptomatic participants performed semi-squat exercises with three squat depths (20°, 50° and 80° of knee flexion) while following three knee movement paths (neutral, varus or valgus). Normalized VMO : VL ratio from linear envelope surface electromyography was analysed. Results No significant effect was found for gender (p = 0.87), leg dominance (p = 0.99) or knee position (p = 0.44). A significant effect was found for squat depth (p < 0.001) with both the 50° and 80° squats showing increases in VMO : VL ratio (p = 0.031 and p = 0.028), respectively. The VMO : VL ratio was not influenced by gender, leg dominance or knee position in semi-squat exercises. Discussion and Conclusion Increases in relative VMO activation did occur in 'deeper' squat depths (50° and 80° knee flexion) compared with the 20° condition. Further research is needed in this area concerning the effects of such exercise modifications on a symptomatic patellofemoral pain syndrome population. Copyright © 2015 John Wiley & Sons, Ltd. References Anderson R, Courtney C, Carmeli E. EMG analysis of the vastus medialis/vastus lateralis muscles utilizing the unloaded narrow- and wide-stance squats. Journal of Sports Rehabilitation 1998; 7: 236–247. Bloomquist K1, Langberg H, Karlsen S, Madsgaard S, Boesen M, Raastad T. Effect of range of motion in heavy load squatting on muscle and tendon adaptations. Eur J Applied Physiology 2013; 113(8): 2133–2142. Boling M, Bolgla L, Mattacola C, Uhl T, Hosey R. Outcomes of a weight-bearing rehabilitation program for patients diagnosed with patellofemoral pain syndrome. Archives of Physical Medicine and Rehabilitation 2006; 87: 1428–1435. Burden A. How should we normalize electromyograms obtained from healthy participants? What we have learned from over 25 years of research. Journal of Electromyography and Kinesiology 2010; 20: 1023–1035. Cerny K. Vastus medialis oblique/vastus lateralis muscle activity ratios for selected exercises in persons with and without patellofemoral pain syndrome. Physical Therapy 1995; 75(8): 672–683. Coqueiro K, Bevilaqua-Grossi D, Berzin F, Soares A, Candolo C, Monteiro-Pedro V. Analysis on the activation of the VMO and VLL muscles during semi- squat exercises with and without hip adduction in individuals with patellofemoral pain syndrome. Journal of Electromyography and Kinesiology 2005; 15: 596–603. Crossley K, Cowan S, Bennell K, McConnell J. Patellar taping: is clinical success supported by scientific evidence? Manual Therapy 2000; 5(3): 142–150. Earl J, Schmitz R, Arnold B. Activation of the VMO and VL during dynamic mini-squat exercises with and without isometric hip adduction. Journal of Electro- myography and Kinesiology 2001; 11: 381–386. Edwards J, Greene K, Davis R, Kovacik M, Noe D, Askew M. Measuring flexion in knee arthroscopy patients. The Journal of Arthoplasty 2004; 19(3): 329–372. Escamilla R, Fleisig G, Zheng N, Lander J, Barrentine S, Andrews J, Bergemann B, Moorman C. Effects of technique variations on knee biomechanics during the squat and leg press. Medicine and Science in Sports and Exercise 2001; 33(9): 1552–1566. Gregersen C, Hull M, Hakansson N. How changing the inversion/eversion foot angle affects the nondriving intersegmental knee moments and the relative activation of the vastii muscles in cycling. Journal of Biomechanical Engineering 2006; 128: 391–398. Grelsamer R, Klein J. The biomechanics of the patellofemoral joint. Journal of Orthopaedic and Sports Physical Therapy 1998; 28(5): 286–298. Hartmann H, Wirth K, Klusemann M. Analysis of the load on the knee joint and vertebral column with changes in squatting depth and weight load. Sports Medicine 2013; 43(10): 993–1008. Herrington L, Blacker M, Enjuanes N, Smith P, Worthington D. The effect of limb position, exercise mode and contraction type on overall activity of VMO and VL. Physical Therapy In Sport 2006; 7: 87–92. Hof AL. The relationship between electromyogram and muscle force. Sportverletzung Sportschaden 1997; 11(3): 79–86. Hubbard J, Sampson H, Elledge J. Prevalence and morphology of the vastus medialis oblique muscle in human cadavers. The Anatomical Record 1997; 249(1): 135–142. Irish S, Millward A, Wride J, Haas B, Shum G. The effect of closed-kinetic chain exercises and open-kinetic chain exercise on the muscle activity of vastus medialis oblique and vastus lateralis. Journal of Strength and Conditioning Research 2010; 24(5): 1256–1262. Isear J, Erickson J, Worrell T. EMG analysis of lower extremity muscle recruitment patterns during an unloaded squat. Medicine and Science in Sports and Exercise 1997; 29(4): 532–539. Lam P, Ng G. Activation of the quadriceps muscle during semi-squatting with different hip and knee positions in patients with anterior knee pain. American Journal of Physical Medicine and Rehabilitation 2001; 80: 804–808. Lehman G, McGill S. The importance of normalization in the interpretation of surface electromyography: a proof of principle. Journal of Manipulative and Physiological Therapeutics 1999; 22(7): 444–446. Levangie P, Norkin C. Joint Structure and Function: A Comprehensive Analysis. Philadelphia, PA: F.A. Davis Co. 2006. Liaw S. A surface electromyographic study on the activation of vastus medialis oblique and vastus lateralis in different foot positions during step-up. Physiotherapy Singapore 2000; 3: 4–9. Magee D. Orthopedic Physical Assessment. Philadelphia: W.B. Saunders Co. 1992. Miller J, Sedory D, Croce R. Vastus medialis obliquus and vastus lateralis activity in patients with and without patellofemoral pain syndrome. Journal of Sports Rehabilitation 1997; 6: 1–10. Mirzabeigi E, Jordan C, Gronley J, Rockowitz N, Perry J. Isolation of the vastus medialis oblique muscle during exercise. American Journal of Sports Medicine 1999; 27(1): 50–53. Monteiro-Pedro V, Vitti M, Bérzin F, Bevilaqua-Grosso D. Electromyographic activity of vastus medialis oblique muscle in step-up and step-down exercises. Brazilian Journal of Morphological Science 1997; 14: 19–23. Mostamand J, Bader DL, Hudson Z. Reliability testing of vasti activity measurements in taped and untaped patellofemoral conditions during single leg squatting in healthy subjects: a pilot study. Journal of Bodywork and Movement Therapy 2013; 17(3): 271–277. Murray M. Gait as a total pattern of movement. American Journal of Physical Medicine 1967; 46: 290. Ng G, Zhang A, Li C. Biofeedback exercise improved the EMG activity ratio of the medial and lateral vasti muscles in subjects with patellofemoral pain syndrome. Journal of Electromyography and Kinesiology: official journal of the International Society of Electrophysiological Kinesiology 2008; 18(1): 128–133. Norkin C, White D. Measurement of Joint Motion: A Guide to Goniometry. Philadelphia: FA Davis 1995 Panagiotopoulos E, Strzelczyk P, Herrmann M, Scuderi G. Cadaveric study on static medial patellar stabilisers: the dynamizing role of the vastus medialis obliquus on medial patellofemoral ligament. Knee Surgery, Sports Traumatology, Arthroscopy 2006; 14 7–12. Powers C. Rehabilitation of patellofemoral joint disorders: a critical review. Journal of Orthopaedic and Sports Physical Therapy 1998; 28(5): 345–354. Powers C. Patellar kinematics, part I: the influence of vastus muscle activity in subjects with and without. Physical Therapy 2000; 80(10): 956–964. Rassier D, MacIntosh B, Herzog W. Length dependence of active force production in skeletal muscle. Journal of Applied Physiology 1999; 86(5): 1445–1457. Rice M, Bennett J, Rugling R. Comparison of two exercises on vastus medialis oblique and vastus lateralis electromyographic activity and force production. Isokinetic and Exercise Science 1995; 5: 61–67. Ryan C, Rowe P. An electromyographical study to investigate the effects of patellar taping on the vastus medialis/vastus lateralis ratio in asymptomatic participants. Physiotherapy Theory and Practice 2006; 22(6): 309–315. Sczepanski T, Gross M, Duncan P, Chander M. Effect of contraction type, angular velocity, and arc of motion on VMO:VL EMG ratio. Journal of Orthopaedic and Sports Physical Therapy 1991; 14(6): 1552–1566. Souza D and Gross M. Comparison of vastus medialis obliquus: vastus lateralis muscle integrated electromyographic ratios between healthy subjects and patients with patellofemoral pain. Physical Therapy 1991; 71(4): 310–320. Tang S, Chen C, Hsu R, Chou S, Hong W, Lew H. Vastus medialis obliquus and vastus lateralis activity in open and closed kinetic chain exercises in patients with patellofemoral pain syndrome: an electromyographic study. Archives of Physical Medicine and Rehabilitation 2001; 82(10): 1441–5. Willis F, Burkhardt E, Walker J, Johnson M, Spears T. Preferential vastus medialis oblique activation achieved as a treatment for knee disorders. Journal of Strength and Conditioning Research 2005; 19: 286–291. Witvrouw E, Sneyers C, Lysens R, Victor J, Bellemans J. Reflex response times of vastus medialis oblique and vastus lateralis in normal subjects and in subjects with patellofemoral pain syndrome. Journal of Orthopaedic and Sports Physical Therapy 1996; 24(3): 160–165. Zakaria D, Harburn K, Kramer J. Preferential activation of the vastus medialis oblique, vastus lateralis, and hip adductor muscles during isometric exercises in females. Journal of Orthopaedic and Sports Physical Therapy 1997; 26(1): 23–28. Zeller B, McCrory J, Kibler W, Uhl T. Differences in kinematics and electromyographic activity between men and women during the single-legged squat. American Journal of Sports Medicine 2003; 31: 449–456. Citing Literature Volume21, Issue3September 2016Pages 164-173 ReferencesRelatedInformation