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Kinematic and EMG activities during front and back squat variations in maximum loads.
J Sports Sci. 2015; 33(10):1058-66.JS

Abstract

The aim of this study was to compare the musculature activity and kinematics of knee and hip joints during front and back squat with maximal loading. Two-dimensional kinematical data were collected and electromyographic activities of vastus lateralis, vastus medialis, rectus femoris, semitendinosus, biceps femoris, gluteus maximus and erector spinae were measured while participants (n = 12, 21.2 ± 1.9 years old) were completing front and back squat exercises with maximum loading. Paired sample t-test was used for comparisons between two techniques. Results showed that the electromyographic activity of vastus medialis was found to be greater in the front squat compared to the back squat during the ascending phase (P < 0.05, d = 0.62; 95% CI, -15.0/-4.17) and the whole manoeuvre (P < 0.05, d = 0.41; 95% CI, -12.8/-0.43), while semitendinosus (P < 0.05, d = -0.79; 95% CI, 0.62/20.59) electromyographic activity was greater in the back squat during the ascending phase. Compared to the front squat version, back squat exhibited significantly greater trunk lean, with no differences occurring in the knee joint kinematics throughout the movement. Results may suggest that the front squat may be preferred to the back squat for knee extensor development and for preventing possible lumbar injuries during maximum loading.

Authors+Show Affiliations

a Sports Medicine , Near East University Hospital , Nicosia , Cyprus.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

25630691

Citation

Yavuz, Hasan Ulas, et al. "Kinematic and EMG Activities During Front and Back Squat Variations in Maximum Loads." Journal of Sports Sciences, vol. 33, no. 10, 2015, pp. 1058-66.
Yavuz HU, Erdağ D, Amca AM, et al. Kinematic and EMG activities during front and back squat variations in maximum loads. J Sports Sci. 2015;33(10):1058-66.
Yavuz, H. U., Erdağ, D., Amca, A. M., & Aritan, S. (2015). Kinematic and EMG activities during front and back squat variations in maximum loads. Journal of Sports Sciences, 33(10), 1058-66. https://doi.org/10.1080/02640414.2014.984240
Yavuz HU, et al. Kinematic and EMG Activities During Front and Back Squat Variations in Maximum Loads. J Sports Sci. 2015;33(10):1058-66. PubMed PMID: 25630691.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Kinematic and EMG activities during front and back squat variations in maximum loads. AU - Yavuz,Hasan Ulas, AU - Erdağ,Deniz, AU - Amca,Arif Mithat, AU - Aritan,Serdar, Y1 - 2015/01/29/ PY - 2015/1/30/entrez PY - 2015/1/30/pubmed PY - 2015/12/15/medline KW - biomechanics KW - electromyography KW - maximal loading KW - strength training KW - two-dimensional SP - 1058 EP - 66 JF - Journal of sports sciences JO - J Sports Sci VL - 33 IS - 10 N2 - The aim of this study was to compare the musculature activity and kinematics of knee and hip joints during front and back squat with maximal loading. Two-dimensional kinematical data were collected and electromyographic activities of vastus lateralis, vastus medialis, rectus femoris, semitendinosus, biceps femoris, gluteus maximus and erector spinae were measured while participants (n = 12, 21.2 ± 1.9 years old) were completing front and back squat exercises with maximum loading. Paired sample t-test was used for comparisons between two techniques. Results showed that the electromyographic activity of vastus medialis was found to be greater in the front squat compared to the back squat during the ascending phase (P < 0.05, d = 0.62; 95% CI, -15.0/-4.17) and the whole manoeuvre (P < 0.05, d = 0.41; 95% CI, -12.8/-0.43), while semitendinosus (P < 0.05, d = -0.79; 95% CI, 0.62/20.59) electromyographic activity was greater in the back squat during the ascending phase. Compared to the front squat version, back squat exhibited significantly greater trunk lean, with no differences occurring in the knee joint kinematics throughout the movement. Results may suggest that the front squat may be preferred to the back squat for knee extensor development and for preventing possible lumbar injuries during maximum loading. SN - 1466-447X UR - https://www.unboundmedicine.com/medline/citation/25630691/Kinematic_and_EMG_activities_during_front_and_back_squat_variations_in_maximum_loads_ L2 - https://www.tandfonline.com/doi/full/10.1080/02640414.2014.984240 DB - PRIME DP - Unbound Medicine ER -