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Electromyographic and Force Plate Analysis of the Deadlift Performed With and Without Chains.
J Strength Cond Res. 2016 May; 30(5):1177-82.JS

Abstract

The purpose of this study was to determine the effects of deadlift chain variable resistance on surface electromyography (EMG) of the gluteus maximus, erector spinae, and vastus lateralis muscles, ground reaction forces (GRFs), and rate of force development (RFD). Thirteen resistance-trained men (24.0 ± 2.1 years, 179.3 ± 4.8 cm, 87.0 ± 10.6 kg) volunteered for the study. On day 1, subjects performed 1 repetition maximum (1RM) testing of the deadlift exercise. On day 2, subjects performed one set of 3 repetitions with a load of 85% 1RM with chains (CH) and without chains (NC). The order of the CH and NC conditions was randomly determined for each subject. For the CH condition, the chains accounted for approximately 20% (19.9 ± 0.6%) of the 85% 1RM load, matched at the top of the lift. Surface EMG was recorded to differentiate muscle activity between conditions (CH, NC), range of motion (ROM; bottom, top), and phase (concentric, eccentric). Peak GRFs and RFD were measured using a force plate. Electromyography results revealed that for the gluteus maximus there was significantly greater EMG activity during the NC condition vs. the CH condition. For the erector spinae, EMG activity was greater at the bottom than the top ROM (p ≤ 0.05). Force plate results revealed that deadlifting at 85% 1RM with an accommodating chain resistance of approximately 20% results in a reduction in GRFs (p ≤ 0.05) and no change in RFD (p > 0.05). Collectively, these results suggest that the use of chain resistance during deadlifting can alter muscle activation and force characteristics of the lift.

Authors+Show Affiliations

Department of Kinesiology, Center for Sport Performance, California State University, Fullerton, California.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

26840441

Citation

Nijem, Ramsey M., et al. "Electromyographic and Force Plate Analysis of the Deadlift Performed With and Without Chains." Journal of Strength and Conditioning Research, vol. 30, no. 5, 2016, pp. 1177-82.
Nijem RM, Coburn JW, Brown LE, et al. Electromyographic and Force Plate Analysis of the Deadlift Performed With and Without Chains. J Strength Cond Res. 2016;30(5):1177-82.
Nijem, R. M., Coburn, J. W., Brown, L. E., Lynn, S. K., & Ciccone, A. B. (2016). Electromyographic and Force Plate Analysis of the Deadlift Performed With and Without Chains. Journal of Strength and Conditioning Research, 30(5), 1177-82. https://doi.org/10.1519/JSC.0000000000001351
Nijem RM, et al. Electromyographic and Force Plate Analysis of the Deadlift Performed With and Without Chains. J Strength Cond Res. 2016;30(5):1177-82. PubMed PMID: 26840441.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electromyographic and Force Plate Analysis of the Deadlift Performed With and Without Chains. AU - Nijem,Ramsey M, AU - Coburn,Jared W, AU - Brown,Lee E, AU - Lynn,Scott K, AU - Ciccone,Anthony B, PY - 2016/2/4/entrez PY - 2016/2/4/pubmed PY - 2016/12/15/medline SP - 1177 EP - 82 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 30 IS - 5 N2 - The purpose of this study was to determine the effects of deadlift chain variable resistance on surface electromyography (EMG) of the gluteus maximus, erector spinae, and vastus lateralis muscles, ground reaction forces (GRFs), and rate of force development (RFD). Thirteen resistance-trained men (24.0 ± 2.1 years, 179.3 ± 4.8 cm, 87.0 ± 10.6 kg) volunteered for the study. On day 1, subjects performed 1 repetition maximum (1RM) testing of the deadlift exercise. On day 2, subjects performed one set of 3 repetitions with a load of 85% 1RM with chains (CH) and without chains (NC). The order of the CH and NC conditions was randomly determined for each subject. For the CH condition, the chains accounted for approximately 20% (19.9 ± 0.6%) of the 85% 1RM load, matched at the top of the lift. Surface EMG was recorded to differentiate muscle activity between conditions (CH, NC), range of motion (ROM; bottom, top), and phase (concentric, eccentric). Peak GRFs and RFD were measured using a force plate. Electromyography results revealed that for the gluteus maximus there was significantly greater EMG activity during the NC condition vs. the CH condition. For the erector spinae, EMG activity was greater at the bottom than the top ROM (p ≤ 0.05). Force plate results revealed that deadlifting at 85% 1RM with an accommodating chain resistance of approximately 20% results in a reduction in GRFs (p ≤ 0.05) and no change in RFD (p > 0.05). Collectively, these results suggest that the use of chain resistance during deadlifting can alter muscle activation and force characteristics of the lift. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/26840441/Electromyographic_and_Force_Plate_Analysis_of_the_Deadlift_Performed_With_and_Without_Chains_ L2 - http://dx.doi.org/10.1519/JSC.0000000000001351 DB - PRIME DP - Unbound Medicine ER -