Effect of Foot Position on the Electromyographical Activity of the Superficial Quadriceps Muscles During the Parallel Squat and Knee Extension

Signorile, Joseph F.; Kwiatkowski, K.; Caruso, John F.; Robertson, Bobby

doi:10.1519/00124278-199508000-00011

Cited by 9 publications

(15 citation statements)

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“…These larger kinetic values corresponded with greater frontal and transverse rotations of the femur during the powerlifting squat compared with the other exercises. Recently, there has been interest in altering the position of the femur during squatting exercises to target specific muscle groups (11,23,25). Anecdotally, it is believed that performing the squat with the hip in external rotation increases muscle activity of the quadriceps and hip abductors (25).…”

Section: Discussionmentioning

confidence: 99%

“…Recently, there has been interest in altering the position of the femur during squatting exercises to target specific muscle groups (11,23,25). Anecdotally, it is believed that performing the squat with the hip in external rotation increases muscle activity of the quadriceps and hip abductors (25). Research conducted thus far has failed to demonstrate changes in quadriceps activity with altered rotation of the femur (11,25); however, data exist to suggest that muscle activity of the hip abductors can be influenced (23).…”

Section: Discussionmentioning

confidence: 99%

“…Anecdotally, it is believed that performing the squat with the hip in external rotation increases muscle activity of the quadriceps and hip abductors (25). Research conducted thus far has failed to demonstrate changes in quadriceps activity with altered rotation of the femur (11,25); however, data exist to suggest that muscle activity of the hip abductors can be influenced (23). Previous studies have attempted to control the position of the femur by fixing the orientation of the foot.…”

Section: Discussionmentioning

confidence: 99%

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A Biomechanical Comparison of the Traditional Squat, Powerlifting Squat, and Box Squat

Swinton

Lloyd

Keogh

et al. 2012

Journal of Strength and Conditioning Research

118

107

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Swinton, PA, Lloyd, R, Keogh, JWL, Agouris, I, and Stewart, AD. A biomechanical comparison of the traditional squat, powerlifting squat, and box squat. J Strength Cond Res 26(7): 1805-1816, 2012. The purpose of this study was to compare the biomechanics of the traditional squat with 2 popular exercise variations commonly referred to as the powerlifting squat and box squat. Twelve male powerlifters performed the exercises with 30, 50, and 70% of their measured 1 repetition maximum (1RM), with instruction to lift the loads as fast as possible. Inverse dynamics and spatial tracking of the external resistance were used to quantify biomechanical variables. A range of significant kinematic and kinetic differences (p , 0.05) emerged between the exercises. The traditional squat was performed with a narrow stance, whereas the powerlifting squat and box squat were performed with similar wide stances (48.3 6 3.8, 89.6 6 4.9, 92.1 6 5.1 cm, respectively). During the eccentric phase of the traditional squat, the knee traveled past the toes resulting in anterior displacement of the system center of mass (COM). In contrast, during the powerlifting squat and box squat, a more vertical shin position was maintained, resulting in posterior displacements of the system COM. These differences in linear displacements had a significant effect (p , 0.05) on a number of peak joint moments, with the greatest effects measured at the spine and ankle. For both joints, the largest peak moment was produced during the traditional squat, followed by the powerlifting squat, then box squat. Significant differences (p , 0.05) were also noted at the hip joint where the largest moment in all 3 planes were produced during the powerlifting squat. Coaches and athletes should be aware of the biomechanical differences between the squatting variations and select according to the kinematic and kinetic profile that best match the training goals.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

A Biomechanical Comparison of the Traditional Squat, Powerlifting Squat, and Box Squat

Swinton

Lloyd

Keogh

et al. 2012

Journal of Strength and Conditioning Research

118

107

View full text Add to dashboard Cite

show abstract

“…Knee joint consists of tibiofemoral, which carries out movement throughout range of motion of 0 to approximately 160 degrees of flexion 9,10,11 . The hip joint is freely mobile in planes of movement, carrying out flexion and extension in saggital plan, adduction and abduction in frontal plane and internal/ external-rotation and horizontal adduction/abduction in transverse plane 10,11 .…”

Section: Resultsmentioning

confidence: 99%

Screening the Ability to Squat in the Middle aged Population: An Observational Study

Motimath¹

2017

JMSCR

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“…The medial wedge board used in the present study can also be used as a treatment method for misalignment with an excessive Q-angle. Saxena and Haddad 10) reported that when they applied foot wedges to patients with PFPS and conducted biomechanical tests, the range of motion significantly increased along with the alleviation of knee pain; hence, they suggested that wedges could be therapeutically applied. Use of medial and posterior wedge boards during the lunge exercise can selectively strengthen the VMO.…”

Section: Discussionmentioning

confidence: 99%

Effects of Various Foot Wedge Boards on Vastus Medialis Oblique and Vastus Lateralis Muscles during Lunge Exercise

Kim

Yoo

2013

J Phys Ther Sci

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Abstract. [Purpose] This study applied the lunge exercise using a variety of foot wedge boards to analyze differences in the muscle activities of the vastus lateralis (VL) and vastus medialis oblique (VMO) and the VMO/VL ratios. [Subjects] This study was performed on 20 asymptomatic males.[Methods] Surface electromyography measurements were obtained under 5 lunge exercise conditions. [Result] The EMG activity for the VL muscle significantly increased in the order of conditions as follows: anterior wedge < no wedge and medial wedge < lateral wedge and posterior wedge. The EMG activity for the VMO muscle significantly increased in the order of conditions as follows: anterior wedge < no wedge and lateral wedge < medial wedge and posterior wedge. The VMO/VL ratios under the medial wedge and posterior wedge conditions were significantly increased.[Conclusion] Use of medial and posterior wedge boards during the lunge exercise can selectively strengthen the VMO.

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Effect of Foot Position on the Electromyographical Activity of the Superficial Quadriceps Muscles During the Parallel Squat and Knee Extension

Cited by 9 publications

References 0 publications

A Biomechanical Comparison of the Traditional Squat, Powerlifting Squat, and Box Squat

A Biomechanical Comparison of the Traditional Squat, Powerlifting Squat, and Box Squat

Screening the Ability to Squat in the Middle aged Population: An Observational Study

Effects of Various Foot Wedge Boards on Vastus Medialis Oblique and Vastus Lateralis Muscles during Lunge Exercise

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