The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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Effect of Active Foot Arch Support on Lower Extremity Electromyographic Activity during Squat Exercise in Persons with Pronated Foot

회내족 대상자의 스쿼트 동안 능동적 족궁 지지가 하지근육의 근전도 활성도에 미치는 영향

  • Nam, Ki-Seok (Department of Physical Therapy, Yeungnam College of Science & Technology) ;
  • Park, Ji-Won (Department of Physical Therapy, College of Medical Science, Catholic University of Daegu)
  • 남기석 (영남이공대학 물리치료과) ;
  • 박지원 (대구가톨릭대학교 의료과학대학 물리치료학과)
  • Received : 2010.05.24
  • Accepted : 2010.09.24
  • Published : 2010.10.25
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Abstract

Purpose: The purpose of this study was to identify the effect of active foot arch support on the muscles of lower extremity electromyographic activity during squat exercise in persons with pronated foot. Methods: The study subjects were 16 persons with pronated foot. They have no history of surgery in lower extremity and trunk and limitation of range of motion or pain when performing squat exercise. Each subject was measured the navicular drop (ND) to determine the pronated foot. And then the subjects were asked to perform three repetitions of a $90^{\circ}$ knee flexion squat in both conditions which are 1) preferred squat and 2) squat with active foot arch support. Results: Paired t-test revealed that squat with active foot arch support produced significantly greater EMG activities in abductor hallucis (p=0.00), proneus longus (p=0.03) and gluteus medius (p=0.04) than preferred squat. But the EMG activities of tibialis anterior, vastus medialis oblique and vastus lateralis were not showed significantly different between the both squat conditions. Conclusion: The findings of this study suggest that active foot arch support during squat increase the activities of lower extremity muscles which are the abductor hallucis, proneus longus and gluteus medius. Also, the abductor hallucis which is one of the planter intrinsic muscle and peroneus longus play a role in support of the foot arch and active foot arch support induced the increase of the activity of gluteus medius. Therefore active foot arch support can change the lower extremity biomechanics as well as passive foot support such as foot orthotics and taping.

Keywords

References

  1. Headlee D, Leonard J, Hart J, et al. Fatigue of the plantar intrinsic foot muscles increases navicular drop. J Electromyogr Kinesiol. 2008;18(3):420-5. https://doi.org/10.1016/j.jelekin.2006.11.004
  2. Hertel J, Sloss BR, Earl JE. Effect of foot orthotics on quadriceps and gluteus medius electromyographic activity during selected exercises. Arch Phys Med Rehabil. 2005; 86(1):26-30. https://doi.org/10.1016/j.apmr.2004.03.029
  3. Brown GP, Donatelli R, Catlin PA, et al. The effect of two types of foot orthoses on rearfoot mechanics. J Orthop Sports Phys Ther. 1995;21(5):258-67.
  4. Murley GS, Bird AR. The effect of three levels of foot orthotic wedging on the surface electromyographic activity of selected lower limb muscles during gait. Clin Biomech. 2006;21(10): 1074-80. https://doi.org/10.1016/j.clinbiomech.2006.06.007
  5. Nawoczenski DA, Cook TM, Saltzman CL. The effect of foot orthotics on three-dimensional kinematics of the leg and rearfoot during running. J Orthop Sports Phys Ther. 1995;21(6):317-27.
  6. Stell JF, Buckley JG. Controlling excessive pronation: a comparison of casted and non-casted orthoses. The Foot. 1998;8:210-214. https://doi.org/10.1016/S0958-2592(98)90031-1
  7. Keenan AM, Tanner CM. The effect of high-Dye and low-Dye taping on rearfoot motion. J Am Podiatr Med Assoc. 2001;91(5):255-61.
  8. P. Harradine, L. Herrington, R. Wright. The effect of Low Dye taping upon rearfoot motion and position before and after exercise. The Foot. 2001;11:57-60 https://doi.org/10.1054/foot.2000.0656
  9. Earl JE, Schmitz RJ, Arnold BL. Activation of the VMO and VL during dynamic mini-squat exercises with and without isometric hip adduction. J Electromyogr Kinesiol. 2001; 11(6):381-6. https://doi.org/10.1016/S1050-6411(01)00024-4
  10. Hislop H, Montgomery J. Daniel's and Worthingham's Muscle Testing. 8th ed. Elsevier. New York, USA. 2007:199.
  11. Rainoldi A, Melchiorri G, Caruso I. A method for positioning electrodes during surface EMG recordings in lower limb muscles. J Neurosci Methods. 2004;134(1):37-43. https://doi.org/10.1016/j.jneumeth.2003.10.014
  12. Mann R, Inman V. Phasic activity of intrinsic muscles of the foot. J Bone Joint Surg 1964;46A:469-81.
  13. Cornwall MW, McPoil TG. The influence of tibialis anterior muscle activity on rearfoot motion during walking. Foot Ankle Int. 1994;15(2):75-9. https://doi.org/10.1177/107110079401500205
  14. Nam KS. Effect of the resistance direction by an elastic band on the VMO/VL electromyographic activity ratio during dynamic squat exercise. J Kor Soc Phys Ther. 2008; 20(3):29-34.
  15. Murley GS, Bird AR. The effect of three levels of foot orthotic wedging on the surface electromyographic activity of selected lower limb muscles during gait. Clin Biomech. 2006;21(10): 1074-80. https://doi.org/10.1016/j.clinbiomech.2006.06.007
  16. O'Connor KM, Hamill J. The role of selected extrinsic foot muscles during running. Clin Biomech. 2004;19(1):71-7. https://doi.org/10.1016/j.clinbiomech.2003.09.001
  17. Fiolkowski P, Brunt D, Bishop M, et al.Intrinsic pedal musculature support of the medial longitudinal arch: an electromyography study. J Foot Ankle Surg. 2003;42(6): 327-33. https://doi.org/10.1053/j.jfas.2003.10.003