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British Journal of Sports Medicine logoLink to British Journal of Sports Medicine
. 2004 Apr;38(2):210–213. doi: 10.1136/bjsm.2002.003277

Combining isometric knee extension exercises with hip adduction or abduction does not increase quadriceps EMG activity

J Hertel 1, J Earl 1, K Tsang 1, S Miller 1
PMCID: PMC1724794  PMID: 15039261

Abstract

Objective: To determine if the combined isometric contractions of knee extension/hip adduction and knee extension/hip abduction will elicit a different quadriceps and gluteus medius electromyographic (EMG) pattern as compared to isometric contraction of a uniplanar knee extension exercise.

Methods: Eight healthy young adult volunteers without history of knee or quadriceps injury participated. Surface EMG data were collected from the vastus medialis oblique (VMO), vastus lateralis (VL), and gluteus medius (Gmed) muscles of the dominant leg of each subject during three single leg, weight bearing, isometric exercises (uniplanar knee extension, knee extension/hip adduction, knee extension/hip abduction). All exercises were performed at a position of 60° knee flexion. Three trials lasting 5 s each were performed for each of the three exercises. EMG data from each muscle were integrated and the maximum root mean square activity over a 0.5 s window for each trial was averaged. Analyses of variance were performed with exercise (straight extension, extension/adduction, extension/abduction) as the independent variable and VMO, VL, and Gmed activity and VMO:VL ratio as dependent variables.

Results: A significant main effect for exercise was found for the VMO (p = 0.006) and VL (p = 0.02), but not the Gmed (p = 0.25) or the VMO:VL ratio (p = 0.13). For the VMO and VL, the uniplanar knee extension task produced significantly more EMG activity than the extension/adduction or extension/abduction tasks.

Conclusions: Uniplanar knee extension exercises may be more appropriate than combining isometric knee extension exercises with hip adduction or abduction when eliciting maximal VMO and VL contractions.

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Selected References

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  1. Callaghan M. J., McCarthy C. J., Oldham J. A. Electromyographic fatigue characteristics of the quadriceps in patellofemoral pain syndrome. Man Ther. 2001 Feb;6(1):27–33. doi: 10.1054/math.2000.0380. [DOI] [PubMed] [Google Scholar]
  2. Cerny K. Vastus medialis oblique/vastus lateralis muscle activity ratios for selected exercises in persons with and without patellofemoral pain syndrome. Phys Ther. 1995 Aug;75(8):672–683. doi: 10.1093/ptj/75.8.672. [DOI] [PubMed] [Google Scholar]
  3. Cesarelli M., Bifulco P., Bracale M. Study of the control strategy of the quadriceps muscles in anterior knee pain. IEEE Trans Rehabil Eng. 2000 Sep;8(3):330–341. doi: 10.1109/86.867875. [DOI] [PubMed] [Google Scholar]
  4. Cowan S. M., Bennell K. L., Hodges P. W., Crossley K. M., McConnell J. Delayed onset of electromyographic activity of vastus medialis obliquus relative to vastus lateralis in subjects with patellofemoral pain syndrome. Arch Phys Med Rehabil. 2001 Feb;82(2):183–189. doi: 10.1053/apmr.2001.19022. [DOI] [PubMed] [Google Scholar]
  5. Earl J. E., Schmitz R. J., Arnold B. L. Activation of the VMO and VL during dynamic mini-squat exercises with and without isometric hip adduction. J Electromyogr Kinesiol. 2001 Dec;11(6):381–386. doi: 10.1016/s1050-6411(01)00024-4. [DOI] [PubMed] [Google Scholar]
  6. Grabiner M. D., Koh T. J., Miller G. F. Fatigue rates of vastus medialis oblique and vastus lateralis during static and dynamic knee extension. J Orthop Res. 1991 May;9(3):391–397. doi: 10.1002/jor.1100090311. [DOI] [PubMed] [Google Scholar]
  7. Hanten W. P., Schulthies S. S. Exercise effect on electromyographic activity of the vastus medialis oblique and vastus lateralis muscles. Phys Ther. 1990 Sep;70(9):561–565. doi: 10.1093/ptj/70.9.561. [DOI] [PubMed] [Google Scholar]
  8. Hase K., Stein R. B. Turning strategies during human walking. J Neurophysiol. 1999 Jun;81(6):2914–2922. doi: 10.1152/jn.1999.81.6.2914. [DOI] [PubMed] [Google Scholar]
  9. Hodges P. W., Richardson C. A. The influence of isometric hip adduction on quadriceps femoris activity. Scand J Rehabil Med. 1993 Jun;25(2):57–62. [PubMed] [Google Scholar]
  10. Host J. V., Craig R., Lehman R. C. Patellofemoral dysfunction in tennis players. A dynamic problem. Clin Sports Med. 1995 Jan;14(1):177–203. [PubMed] [Google Scholar]
  11. Karst G. M., Jewett P. D. Electromyographic analysis of exercises proposed for differential activation of medial and lateral quadriceps femoris muscle components. Phys Ther. 1993 May;73(5):286–299. doi: 10.1093/ptj/73.5.286. [DOI] [PubMed] [Google Scholar]
  12. Karst G. M., Willett G. M. Onset timing of electromyographic activity in the vastus medialis oblique and vastus lateralis muscles in subjects with and without patellofemoral pain syndrome. Phys Ther. 1995 Sep;75(9):813–823. doi: 10.1093/ptj/75.9.813. [DOI] [PubMed] [Google Scholar]
  13. Lam P. L., Ng G. Y. Activation of the quadriceps muscle during semisquatting with different hip and knee positions in patients with anterior knee pain. Am J Phys Med Rehabil. 2001 Nov;80(11):804–808. doi: 10.1097/00002060-200111000-00003. [DOI] [PubMed] [Google Scholar]
  14. Laprade J., Culham E., Brouwer B. Comparison of five isometric exercises in the recruitment of the vastus medialis oblique in persons with and without patellofemoral pain syndrome. J Orthop Sports Phys Ther. 1998 Mar;27(3):197–204. doi: 10.2519/jospt.1998.27.3.197. [DOI] [PubMed] [Google Scholar]
  15. Monteiro-Pedro V., Vitti M., Bérzin F., Bevilaqua-Grosso D. The effect of free isotonic and maximal isometric contraction exercises of the hip adduction on vastus medialis oblique muscle: an electromyographic study. Electromyogr Clin Neurophysiol. 1999 Oct-Dec;39(7):435–440. [PubMed] [Google Scholar]
  16. Møller B. N., Krebs B., Tidemand-Dal C., Aaris K. Isometric contractions in the patellofemoral pain syndrome. An electromyographic study. Arch Orthop Trauma Surg. 1986;105(1):24–27. doi: 10.1007/BF00625655. [DOI] [PubMed] [Google Scholar]
  17. Powers C. M., Landel R., Perry J. Timing and intensity of vastus muscle activity during functional activities in subjects with and without patellofemoral pain. Phys Ther. 1996 Sep;76(9):946–967. doi: 10.1093/ptj/76.9.946. [DOI] [PubMed] [Google Scholar]
  18. Soderberg G. L., Knutson L. M. A guide for use and interpretation of kinesiologic electromyographic data. Phys Ther. 2000 May;80(5):485–498. [PubMed] [Google Scholar]
  19. Souza D. R., Gross M. T. Comparison of vastus medialis obliquus: vastus lateralis muscle integrated electromyographic ratios between healthy subjects and patients with patellofemoral pain. Phys Ther. 1991 Apr;71(4):310–320. doi: 10.1093/ptj/71.4.310. [DOI] [PubMed] [Google Scholar]
  20. Tang S. F., Chen C. K., Hsu R., Chou S. W., Hong W. H., Lew H. L. Vastus medialis obliquus and vastus lateralis activity in open and closed kinetic chain exercises in patients with patellofemoral pain syndrome: an electromyographic study. Arch Phys Med Rehabil. 2001 Oct;82(10):1441–1445. doi: 10.1053/apmr.2001.26252. [DOI] [PubMed] [Google Scholar]
  21. Thomeé R., Renström P., Karlsson J., Grimby G. Patellofemoral pain syndrome in young women. II. Muscle function in patients and healthy controls. Scand J Med Sci Sports. 1995 Aug;5(4):245–251. [PubMed] [Google Scholar]
  22. Voight M. L., Wieder D. L. Comparative reflex response times of vastus medialis obliquus and vastus lateralis in normal subjects and subjects with extensor mechanism dysfunction. An electromyographic study. Am J Sports Med. 1991 Mar-Apr;19(2):131–137. doi: 10.1177/036354659101900207. [DOI] [PubMed] [Google Scholar]
  23. Witvrouw E., Lysens R., Bellemans J., Cambier D., Vanderstraeten G. Intrinsic risk factors for the development of anterior knee pain in an athletic population. A two-year prospective study. Am J Sports Med. 2000 Jul-Aug;28(4):480–489. doi: 10.1177/03635465000280040701. [DOI] [PubMed] [Google Scholar]
  24. 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. J Orthop Sports Phys Ther. 1996 Sep;24(3):160–165. doi: 10.2519/jospt.1996.24.3.160. [DOI] [PubMed] [Google Scholar]
  25. Yamashita N. EMG activities in mono- and bi-articular thigh muscles in combined hip and knee extension. Eur J Appl Physiol Occup Physiol. 1988;58(3):274–277. doi: 10.1007/BF00417262. [DOI] [PubMed] [Google Scholar]

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