Effects of Head Direction on Electromyographic Activity of Quadriceps, Center of Pressure and Foot Pressure during Squat Exercise

Yao Xue; Kyu-Ryeong Kim (김규령); Kim Meung Kwon (김명권)

Effects of Head Direction on Electromyographic Activity of Quadriceps, Center of Pressure and Foot Pressure during Squat Exercise

Journal of the Korean Society of Physical Medicine
Abbr : J Korean Soc Phys Med
2021, 16(2), pp.1-8
Publisher : The Korean Society of Physical Medicine
Research Area : Medicine and Pharmacy > Physical Therapy > Other physical therapy
Received : October 29, 2020
Accepted : January 19, 2021
Published : May 31, 2021

Yao Xue ¹, Kyu-Ryeong Kim ¹, Kim Meung Kwon ¹

¹대구대학교

Accredited

ABSTRACT

PURPOSE: This study examined the effects of changes in the head direction (forward, upward 10° and downward 10°) on the quadriceps, center of pressure (COP), and foot pressure during squat exercises. The aim was to determine if the head direction could better activate the quadriceps muscle and provide a safer and stable squat posture during squat exercise. METHODS: Fifteen healthy college students were asked to stand on a Zebris, and three electrodes for sEMG were attached to their vastus medialis oblique (VMO), vastus lateralis (VL), and rectus femoris (RF) muscles. The participants then performed squatting exercises under three head directions (forward, upward 10°, and downward 10°). Surface electrodes were then used to record the EMG data during exercise. The Zebris FDM-SX was used to measure the foot pressure and COP of the participants. RESULTS: In squat exercise, the upward head direction group showed significantly higher VL activation than the downward head direction group (p < .05). The upward head direction group showed a significant backward change in the deviation of the COP than the downward and forward groups (p < .05). The upward head direction group showed a significant decrease in forefoot pressure than the downward and forward groups (p < .05) and an increase in the hindfoot pressure compared to the downward and forward groups (p < .05). CONCLUSION: The head direction upward in squat exercise has a positive effect on the quadriceps.

KEYWORDS

Electromyography, Exercise, Quadriceps muscle

Citation status

* References for papers published after 2023 are currently being built.

[journal] Schoenfeld BJ / 2010 / Squatting kinematics and kinetics and their application to exercise performance / J Strength Cond Res 24(12) : 3497~3506

[journal] Fry AC / 2003 / Effect of knee position on hip and knee torques during the barbell squat / J Strength Cond Res 17(4) : 629~633

[journal] Escamilla RF / 2001 / Effects of technique variations on knee biomechanics during the squat and leg press / Med Sci Sports Exerc 33(9) : 1552~1566

[journal] Escamilla RF / 2001 / Knee biomechanics of the dynamic squat exercise / Med Sci Sports Exerc 33(1) : 127~141

[journal] Signorile JF / 1995 / Effect of foot position on the electromyographical activity of the superficial quadriceps muscles during the parallel squat and knee extension / J Strength Cond Res 9(3) : 182~187

[journal] Boyden G / 2000 / A comparison of quadriceps electromyographic activity with the position of the foot during the parallel squat / J Strength Cond Res 14(4) : 379~382

[journal] Allum J / 1997 / The control of head movements during human balance corrections / J Vestib Res 7 : 189~218

[journal] Donnelly DV / 2006 / The effect of the direction of gaze on the kinematics of the squat exercise / J Strength Cond Res 20(1) : 145~150

[journal] Hyong IH / 2013 / Activities of the vastus lateralis and vastus medialis oblique muscles during squats on different surfaces / J Phys Ther Sci 25(8) : 915~917

[journal] 조민권 / 2017 / The effects of performing squats on an inclined board on thigh muscle activation / Physical Therapy Rehabilitation Science / 물리치료재활과학회 6(1) : 39~44

[journal] de Oliveira Sousa C / 2007 / Electromyograhic activity in squatting at 40, 60 and 90 knee flexion positions / Rev Bras Med Esporte 13(5) : 280~286

[journal] Macrum E / 2012 / Effect of limiting ankle-dorsiflexion range of motion on lower extremity kinematics and muscle-activation patterns during a squat / J Sport Rehabil 21(2) : 144~150

[journal] Schütz P / 2014 / Joint angles of the ankle, knee, and hip and loading conditions during split squats / J Appl Biomech 30(3) : 373~380

[journal] Kulas AS / 2012 / Trunk position modulates anterior cruciate ligament forces and strains during a single-leg squat / Clin Biomech 27(1) : 16~21

[journal] Lee TS / 2016 / Activation of back and lower limb muscles during squat exercises with different trunk flexion / J Phys Ther Sci 28(12) : 3407~3410

[journal] Glave AP / 2012 / The effects of two different arm positions and weight status on select kinematic variables during the bodyweight squat / J Strength Cond Res 26(11) : 3148~3154

[journal] Takahashi K / 2015 / Trunk kinematics and muscle activities during arm elevation / J Orthop Sci 20(4) : 624~632

[journal] Myer GD / 2014 / The back squat : a proposed assessment of functional deficits and technical factors that limit performance / Strength Cond J 36(6) : 4~27

[journal] O'Shea P / 1985 / Sports performance series : The parallel squat / Strength Cond J 7(1) : 4~6

[journal] Sibley KM / 2013 / Clinical balance assessment : perceptions of commonly-used standardized measures and current practices among physiotherapists in Ontario, Canada / Implementation Sci 8(1) : 33~

[journal] 윤우람 / 2018 / Effects of Center of Pressure on Muscle Activations and Joint Range of Motion of Lower Extremities during Squat / 한국운동역학회지 / 한국운동역학회 28(1) : 37~43

[journal] Kitamura T / 2019 / Muscle activity pattern with a shifted center of pressure during the squat exercise / J Sports Sci Med 18(2) : 248~252

[journal] Reinold MM / 2004 / Electromyographic analysis of the rotator cuff and deltoid musculature during common shoulder external rotation exercises / J Orthop Sports Phys Ther 34(7) : 385~394

[journal] De Luca CJ / 1997 / The use of surface electromyography in biomechanics / J Appl Biomech 13(2) : 135~163

[journal] Rice MA / 1995 / Comparison of two exercises on VMO and VL EMG activity and force production / Isokinet Exerc Sci 5(2) : 61~67

[book] Kendall FP / 2005 / Muscles, testing and function: with posture and pain / Lippincott, Williams & Wilkins

[journal] 채원식 / 2007 / Effect of Different Heel Plates on Muscle Activities During the Squat / 한국운동역학회지 / 한국운동역학회 17(2) : 113~121

[journal] 백순기 / 2016 / Effects of Using Convergence Circuit Weight Training on the Blood Lipids and Oxygen-carrying Factors in Middle-aged / 한국융합학회논문지 / 한국융합학회 7(6) : 267~274

[journal] Dionisio VC / 2008 / Kinematic, kinetic and EMG patterns during downward squatting / J Electromyogr Kinesiol 18(1) : 134~143

[journal] Kogler A / 2000 / Postural stability using different neck positions in normal subjects and patients with neck trauma / Acta Otolaryngol 120(2) : 151~155

[journal] Barin K / 1992 / Effect of head orientation on the diagnostic sensitivity of posturography in patients with compensated unilateral lesions / Otolaryngol Head Neck Surg 106(4) : 355~362

[journal] Crossley K / 2001 / A systematic review of physical interventions for patellofemoral pain syndrome / Clin J Sport Med 11(2) : 103~110

[journal] Andersen V / 2014 / Muscle activation and strength in squat and Bulgarian squat on stable and unstable surface / Int J Sports Med 35(14) : 1196~1202

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