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Compensatory Muscle Activation During Unstable Overhead Squat Using a Water-filled Training Tube.
J Strength Cond Res. 2018 May; 32(5):1230-1237.JS

Abstract

Glass, SC, and Albert, RW. Compensatory muscle activation during unstable overhead squat using a water-filled training tube. J Strength Cond Res 32(5): 1230-1237, 2018-The purpose of this study was to assess compensatory muscle activation of core and support muscle during an overhead squat using a water-filled training tube. Eleven experienced weightlifting (age = 20.10 ± 0.99, mass 89.17 ± 6.88 kg) men completed 3, 30-second trials of an overhead squat using an 11.4 kg tube that was partially filled with water. A central valve allowed 3 conditions of water movement: 50% open, 100% open, and a stable(S), closed valve condition. Subjects completed 8-10 repetitions within each condition. Electromyographic (EMG) electrodes were placed over the belly of the vastus lateralis, deltoid, rectus abdominus, and paraspinal muscles and recorded during concentric and eccentric (ECC) phases. Integrated EMG were computed and converted to percent maximal voluntary contraction (%MVC). Compensatory activation was assessed using the natural log of the coefficient of variation of %MVC across repetitions. A 1-way repeated-measures analysis of variance across (phase, condition) was used. Significant compensatory muscle activation was seen in the deltoid muscle during ECC (100% open = 3.60 ± 0.50 > stable LogCV = 3.06 ± 0.45). In addition, paraspinal muscle activity was also more variable during the ECC phase (50% open LogCv = 3.28 ± 0.26 > stable = 2.77 ± 0.67). We conclude that the water-filled training tube induces compensatory muscle activation in the deltoid and paraspinal muscles during the ECC phase of the overhead squat.

Authors+Show Affiliations

Department of Movement Science, Human Performance Lab, Grand Valley State University, Allendale Michigan.No affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28557850

Citation

Glass, Stephen C., and Robert W. Albert. "Compensatory Muscle Activation During Unstable Overhead Squat Using a Water-filled Training Tube." Journal of Strength and Conditioning Research, vol. 32, no. 5, 2018, pp. 1230-1237.
Glass SC, Albert RW. Compensatory Muscle Activation During Unstable Overhead Squat Using a Water-filled Training Tube. J Strength Cond Res. 2018;32(5):1230-1237.
Glass, S. C., & Albert, R. W. (2018). Compensatory Muscle Activation During Unstable Overhead Squat Using a Water-filled Training Tube. Journal of Strength and Conditioning Research, 32(5), 1230-1237. https://doi.org/10.1519/JSC.0000000000002000
Glass SC, Albert RW. Compensatory Muscle Activation During Unstable Overhead Squat Using a Water-filled Training Tube. J Strength Cond Res. 2018;32(5):1230-1237. PubMed PMID: 28557850.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Compensatory Muscle Activation During Unstable Overhead Squat Using a Water-filled Training Tube. AU - Glass,Stephen C, AU - Albert,Robert W, PY - 2017/5/31/pubmed PY - 2018/9/5/medline PY - 2017/5/31/entrez SP - 1230 EP - 1237 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 32 IS - 5 N2 - Glass, SC, and Albert, RW. Compensatory muscle activation during unstable overhead squat using a water-filled training tube. J Strength Cond Res 32(5): 1230-1237, 2018-The purpose of this study was to assess compensatory muscle activation of core and support muscle during an overhead squat using a water-filled training tube. Eleven experienced weightlifting (age = 20.10 ± 0.99, mass 89.17 ± 6.88 kg) men completed 3, 30-second trials of an overhead squat using an 11.4 kg tube that was partially filled with water. A central valve allowed 3 conditions of water movement: 50% open, 100% open, and a stable(S), closed valve condition. Subjects completed 8-10 repetitions within each condition. Electromyographic (EMG) electrodes were placed over the belly of the vastus lateralis, deltoid, rectus abdominus, and paraspinal muscles and recorded during concentric and eccentric (ECC) phases. Integrated EMG were computed and converted to percent maximal voluntary contraction (%MVC). Compensatory activation was assessed using the natural log of the coefficient of variation of %MVC across repetitions. A 1-way repeated-measures analysis of variance across (phase, condition) was used. Significant compensatory muscle activation was seen in the deltoid muscle during ECC (100% open = 3.60 ± 0.50 > stable LogCV = 3.06 ± 0.45). In addition, paraspinal muscle activity was also more variable during the ECC phase (50% open LogCv = 3.28 ± 0.26 > stable = 2.77 ± 0.67). We conclude that the water-filled training tube induces compensatory muscle activation in the deltoid and paraspinal muscles during the ECC phase of the overhead squat. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/28557850/Compensatory_Muscle_Activation_During_Unstable_Overhead_Squat_Using_a_Water_filled_Training_Tube_ L2 - http://dx.doi.org/10.1519/JSC.0000000000002000 DB - PRIME DP - Unbound Medicine ER -