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Effects of body position and loading modality on muscle activity and strength in shoulder presses.
J Strength Cond Res. 2013 Jul; 27(7):1824-31.JS

Abstract

Little is known about the effect of performing upper-body resistance exercises with dumbbells versus barbells and standing versus seated. Therefore, this study sought to compare electromyogram activity (EMG) and one-repetition maximum (1-RM) in barbell and dumbbell shoulder presses performed seated and standing. Fifteen healthy men volunteered for 1-RM and EMG testing with a load corresponding to 80% of the 1-RM. Electromyogram activity was measured in the anterior, medial, and posterior deltoids and biceps and triceps brachii. The following EMG differences or trends were observed: For deltoid anterior: ~11% lower for seated barbell versus dumbbell (p = 0.038), ~15% lower in standing barbell versus dumbbell (p < 0.001), ~8% lower for seated versus standing dumbbells (p = 0.070); For medial deltoid, ~7% lower for standing barbell versus dumbbells (p = 0.050), ~7% lower for seated versus standing barbell (p = 0.062), 15% lower for seated versus standing dumbbell (p = 0.008); For posterior deltoid: ~25% lower for seated versus standing barbell (p < 0.001), ~24% lower for seated versus standing dumbbells (p = 0.002); For biceps, ~33% greater for seated barbell versus dumbbells (p = 0.002), 16% greater for standing barbell versus dumbbell (p = 0.074), ~23% lower for seated versus standing dumbbells (p < 0.001); For triceps, ~39% greater for standing barbell versus dumbbells (p < 0.001), ~20% lower for seated versus standing barbell (p = 0.094). 1-RM strength for standing dumbbells was ~7% lower than standing barbell (p = 0.002) and ~10% lower than seated dumbbells (p < 0.001). In conclusion, the exercise with the greatest stability requirement (standing and dumbbells) demonstrated the highest neuromuscular activity of the deltoid muscles, although this was the exercise with the lowest 1-RM strength.

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Authors+Show Affiliations

Saeterbakken AH
FacSogn og Fjordane University College, Sogn og Fjordane, Norway. atle.saeterbakken@hisf.no
Fimland MS
No affiliation info available

MeSH

ElectromyographyExercise TestHumansMaleMuscle, SkeletalPostureResistance TrainingShoulderWeight LiftingYoung Adult

Pub Type(s)

Journal Article

Language

eng

PubMed ID

23096062

Citation

Saeterbakken, Atle H., and Marius S. Fimland. "Effects of Body Position and Loading Modality On Muscle Activity and Strength in Shoulder Presses." Journal of Strength and Conditioning Research, vol. 27, no. 7, 2013, pp. 1824-31.
Saeterbakken AH, Fimland MS. Effects of body position and loading modality on muscle activity and strength in shoulder presses. J Strength Cond Res. 2013;27(7):1824-31.
Saeterbakken, A. H., & Fimland, M. S. (2013). Effects of body position and loading modality on muscle activity and strength in shoulder presses. Journal of Strength and Conditioning Research, 27(7), 1824-31. https://doi.org/10.1519/JSC.0b013e318276b873
Saeterbakken AH, Fimland MS. Effects of Body Position and Loading Modality On Muscle Activity and Strength in Shoulder Presses. J Strength Cond Res. 2013;27(7):1824-31. PubMed PMID: 23096062.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of body position and loading modality on muscle activity and strength in shoulder presses. AU - Saeterbakken,Atle H, AU - Fimland,Marius S, PY - 2012/10/26/entrez PY - 2012/10/26/pubmed PY - 2014/3/29/medline SP - 1824 EP - 31 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 27 IS - 7 N2 - Little is known about the effect of performing upper-body resistance exercises with dumbbells versus barbells and standing versus seated. Therefore, this study sought to compare electromyogram activity (EMG) and one-repetition maximum (1-RM) in barbell and dumbbell shoulder presses performed seated and standing. Fifteen healthy men volunteered for 1-RM and EMG testing with a load corresponding to 80% of the 1-RM. Electromyogram activity was measured in the anterior, medial, and posterior deltoids and biceps and triceps brachii. The following EMG differences or trends were observed: For deltoid anterior: ~11% lower for seated barbell versus dumbbell (p = 0.038), ~15% lower in standing barbell versus dumbbell (p < 0.001), ~8% lower for seated versus standing dumbbells (p = 0.070); For medial deltoid, ~7% lower for standing barbell versus dumbbells (p = 0.050), ~7% lower for seated versus standing barbell (p = 0.062), 15% lower for seated versus standing dumbbell (p = 0.008); For posterior deltoid: ~25% lower for seated versus standing barbell (p < 0.001), ~24% lower for seated versus standing dumbbells (p = 0.002); For biceps, ~33% greater for seated barbell versus dumbbells (p = 0.002), 16% greater for standing barbell versus dumbbell (p = 0.074), ~23% lower for seated versus standing dumbbells (p < 0.001); For triceps, ~39% greater for standing barbell versus dumbbells (p < 0.001), ~20% lower for seated versus standing barbell (p = 0.094). 1-RM strength for standing dumbbells was ~7% lower than standing barbell (p = 0.002) and ~10% lower than seated dumbbells (p < 0.001). In conclusion, the exercise with the greatest stability requirement (standing and dumbbells) demonstrated the highest neuromuscular activity of the deltoid muscles, although this was the exercise with the lowest 1-RM strength. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/23096062/Effects_of_body_position_and_loading_modality_on_muscle_activity_and_strength_in_shoulder_presses_ L2 - https://doi.org/10.1519/JSC.0b013e318276b873 DB - PRIME DP - Unbound Medicine ER -