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Non-uniform excitation of pectoralis major induced by changes in bench press inclination leads to uneven variations in the cross-sectional area measured by panoramic ultrasonography.
J Electromyogr Kinesiol. 2022 Dec; 67:102722.JE

Abstract

This study combined surface electromyography with panoramic ultrasound imaging to investigate whether non-uniform excitation could lead to acute localized variations in cross-sectional area and muscle thickness of the clavicular and sternocostal heads of pectoralis major (PM). Bipolar surface electromyograms (EMGs) were acquired from both PM heads, while 13 men performed four sets of the flat and 45° inclined bench press exercises. Before and immediately after exercise, panoramic ultrasound images were collected transversely to the fibers. Normalized root mean square (RMS) amplitude and variations in the cross-sectional area and muscle thickness were calculated separately for each PM head. For all sets of the inclined bench press, the normalized RMS amplitude was greater for the clavicular head than the sternocostal head (P < 0.001), and the opposite was observed during the flat bench press (P < 0.001). Similarly, while greater increases in cross-sectional area were observed in the clavicular than in the sternocostal head after the inclined bench press (P < 0.001), greater increases were quantified in the sternocostal than in the clavicular head after the flat bench press exercise (P = 0.046). Therefore, our results suggest that the PM regional excitation induced by changes in bench press inclination leads to acute, uneven responses of muscle architecture following the exercise.

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Authors+Show Affiliations

Albarello JCDS
Laboratório de Biomecânica Muscular, Escola de Educação Física e Desportos, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Cabral HV
Department of Clinical and Experimental Sciences, Università degli Studi di Brescia, Brescia, Italy. Electronic address: helio.daveigacabral@unibs.it.
Leitão BFM
Laboratório de Biomecânica Muscular, Escola de Educação Física e Desportos, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Halmenschlager GH
Laboratório de Biomecânica Muscular, Escola de Educação Física e Desportos, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Lulic-Kuryllo T
Department of Clinical and Experimental Sciences, Università degli Studi di Brescia, Brescia, Italy.
Matta TTD
Laboratório de Biomecânica Muscular, Escola de Educação Física e Desportos, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.

MeSH

MaleHumansPectoralis MusclesMuscle, SkeletalElectromyographyExercise TherapyUltrasonographyResistance TrainingWeight LiftingMuscle Strength

Pub Type(s)

Journal Article

Language

eng

PubMed ID

36334406

Citation

Albarello, José Carlos Dos Santos, et al. "Non-uniform Excitation of Pectoralis Major Induced By Changes in Bench Press Inclination Leads to Uneven Variations in the Cross-sectional Area Measured By Panoramic Ultrasonography." Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology, vol. 67, 2022, p. 102722.
Albarello JCDS, Cabral HV, Leitão BFM, et al. Non-uniform excitation of pectoralis major induced by changes in bench press inclination leads to uneven variations in the cross-sectional area measured by panoramic ultrasonography. J Electromyogr Kinesiol. 2022;67:102722.
Albarello, J. C. D. S., Cabral, H. V., Leitão, B. F. M., Halmenschlager, G. H., Lulic-Kuryllo, T., & Matta, T. T. D. (2022). Non-uniform excitation of pectoralis major induced by changes in bench press inclination leads to uneven variations in the cross-sectional area measured by panoramic ultrasonography. Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology, 67, 102722. https://doi.org/10.1016/j.jelekin.2022.102722
Albarello JCDS, et al. Non-uniform Excitation of Pectoralis Major Induced By Changes in Bench Press Inclination Leads to Uneven Variations in the Cross-sectional Area Measured By Panoramic Ultrasonography. J Electromyogr Kinesiol. 2022;67:102722. PubMed PMID: 36334406.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Non-uniform excitation of pectoralis major induced by changes in bench press inclination leads to uneven variations in the cross-sectional area measured by panoramic ultrasonography. AU - Albarello,José Carlos Dos Santos, AU - Cabral,Hélio V, AU - Leitão,Bruno Felipe Mendonça, AU - Halmenschlager,Gustavo Henrique, AU - Lulic-Kuryllo,Tea, AU - Matta,Thiago Torres da, Y1 - 2022/10/25/ PY - 2022/06/08/received PY - 2022/09/20/revised PY - 2022/10/19/accepted PY - 2022/11/6/pubmed PY - 2022/12/15/medline PY - 2022/11/5/entrez KW - Chest press variations KW - Muscle architecture KW - Resistance training KW - Surface electromyography SP - 102722 EP - 102722 JF - Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology JO - J Electromyogr Kinesiol VL - 67 N2 - This study combined surface electromyography with panoramic ultrasound imaging to investigate whether non-uniform excitation could lead to acute localized variations in cross-sectional area and muscle thickness of the clavicular and sternocostal heads of pectoralis major (PM). Bipolar surface electromyograms (EMGs) were acquired from both PM heads, while 13 men performed four sets of the flat and 45° inclined bench press exercises. Before and immediately after exercise, panoramic ultrasound images were collected transversely to the fibers. Normalized root mean square (RMS) amplitude and variations in the cross-sectional area and muscle thickness were calculated separately for each PM head. For all sets of the inclined bench press, the normalized RMS amplitude was greater for the clavicular head than the sternocostal head (P < 0.001), and the opposite was observed during the flat bench press (P < 0.001). Similarly, while greater increases in cross-sectional area were observed in the clavicular than in the sternocostal head after the inclined bench press (P < 0.001), greater increases were quantified in the sternocostal than in the clavicular head after the flat bench press exercise (P = 0.046). Therefore, our results suggest that the PM regional excitation induced by changes in bench press inclination leads to acute, uneven responses of muscle architecture following the exercise. SN - 1873-5711 UR - https://www.unboundmedicine.com/medline/citation/36334406/Non_uniform_excitation_of_pectoralis_major_induced_by_changes_in_bench_press_inclination_leads_to_uneven_variations_in_the_cross_sectional_area_measured_by_panoramic_ultrasonography_ DB - PRIME DP - Unbound Medicine ER -