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The effect of back squat depth on the EMG activity of 4 superficial hip and thigh muscles.
J Strength Cond Res. 2002 Aug; 16(3):428-32.JS

Abstract

The purpose of this study was to measure the relative contributions of 4 hip and thigh muscles while performing squats at 3 depths. Ten experienced lifters performed randomized trials of squats at partial, parallel, and full depths, using 100-125% of body weight as resistance. Electromyographic (EMG) surface electrodes were placed on the vastus medialis (VMO), the vastus lateralis, (VL), the biceps femoris (BF), and the gluteus maximus (GM). EMG data were quantified by integration and expressed as a percentage of the total electrical activity of the 4 muscles. Analysis of variance (ANOVA) and Tukey post hoc tests indicated a significant difference (p < 0.001*, p = 0.056**) in the relative contribution of the GM during the concentric phases among the partial- (16.9%*), parallel- (28.0%**), and full-depth (35.4%*) squats. There were no significant differences between the relative contributions of the BF, the VMO, and the VL at different squatting depths during this phase. The results suggest that the GM, rather than the BF, the VMO, or the VL, becomes more active in concentric contraction as squat depth increases.

Authors+Show Affiliations

The Department of Health and Exercise Science, Furman University, 3300 Poinsett Highway, Greenville, South Carolina 29613, USA. tony.caterisano@furman.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

12173958

Citation

Caterisano, Anthony, et al. "The Effect of Back Squat Depth On the EMG Activity of 4 Superficial Hip and Thigh Muscles." Journal of Strength and Conditioning Research, vol. 16, no. 3, 2002, pp. 428-32.
Caterisano A, Moss RF, Pellinger TK, et al. The effect of back squat depth on the EMG activity of 4 superficial hip and thigh muscles. J Strength Cond Res. 2002;16(3):428-32.
Caterisano, A., Moss, R. F., Pellinger, T. K., Woodruff, K., Lewis, V. C., Booth, W., & Khadra, T. (2002). The effect of back squat depth on the EMG activity of 4 superficial hip and thigh muscles. Journal of Strength and Conditioning Research, 16(3), 428-32.
Caterisano A, et al. The Effect of Back Squat Depth On the EMG Activity of 4 Superficial Hip and Thigh Muscles. J Strength Cond Res. 2002;16(3):428-32. PubMed PMID: 12173958.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effect of back squat depth on the EMG activity of 4 superficial hip and thigh muscles. AU - Caterisano,Anthony, AU - Moss,Raymond F, AU - Pellinger,Thomas K, AU - Woodruff,Katherine, AU - Lewis,Victor C, AU - Booth,Walter, AU - Khadra,Tarick, PY - 2002/8/14/pubmed PY - 2002/10/31/medline PY - 2002/8/14/entrez SP - 428 EP - 32 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 16 IS - 3 N2 - The purpose of this study was to measure the relative contributions of 4 hip and thigh muscles while performing squats at 3 depths. Ten experienced lifters performed randomized trials of squats at partial, parallel, and full depths, using 100-125% of body weight as resistance. Electromyographic (EMG) surface electrodes were placed on the vastus medialis (VMO), the vastus lateralis, (VL), the biceps femoris (BF), and the gluteus maximus (GM). EMG data were quantified by integration and expressed as a percentage of the total electrical activity of the 4 muscles. Analysis of variance (ANOVA) and Tukey post hoc tests indicated a significant difference (p < 0.001*, p = 0.056**) in the relative contribution of the GM during the concentric phases among the partial- (16.9%*), parallel- (28.0%**), and full-depth (35.4%*) squats. There were no significant differences between the relative contributions of the BF, the VMO, and the VL at different squatting depths during this phase. The results suggest that the GM, rather than the BF, the VMO, or the VL, becomes more active in concentric contraction as squat depth increases. SN - 1064-8011 UR - https://www.unboundmedicine.com/medline/citation/12173958/The_effect_of_back_squat_depth_on_the_EMG_activity_of_4_superficial_hip_and_thigh_muscles_ L2 - http://ovidsp.ovid.com/ovidweb.cgi?T=JS&amp;PAGE=linkout&amp;SEARCH=12173958.ui DB - PRIME DP - Unbound Medicine ER -