Mind-muscle connection: effects of verbal instructions on muscle activity during bench press exercise

  • Antonio Paoli | antonio.paoli@unipd.it Department of Biomedical Sciences, University of Padua, Padua, Italy; Research Center for High Performance Sport, UCAM, Catholic University of Murcia, Murcia, Spain. http://orcid.org/0000-0003-0474-4229
  • Laura Mancin Department of Human Sciences and Promotion of the quality of Life, San Raffaele, Roma, Italy.
  • Matteo Saoncella Human Movement Sciences, University of Padova, Italy.
  • Davide Grigoletto Department of Biomedical Sciences, University of Padua, Padua, Italy.
  • Francesco Q. Pacelli Department of Biomedical Sciences, University of Padua, Padua, Italy.
  • Paola Zamparo Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy.
  • Brad J. Schoenfeld Department of Health Sciences, Program of Exercise Science, City University of New York, Lehman College, New York, United States.
  • Giuseppe Marcolin Department of Biomedical Sciences, University of Padua, Padua, Italy.

Abstract

Different attentional foci may modify muscle activation during exercises. Our aim was to determine if it is possible to selectively activate the pectoralis major or triceps brachii muscles according to specific verbal instructions provided during the bench press exercise. 13 resistance-trained males (25.6±5.4 yrs, 182.7±9.1 cm, 86.4±9.7 kg) underwent an electromyographic signals acquisition of the sternocostal head, clavicular head of the pectoralis major, the anterior deltoid, and the long head of the triceps brachii (LT) during bench press exercise. Participants performed one non-instructed set (NIS) of 4 repetitions at 50% 1-repetition maximum (1-RM) and one NIS of 4 repetitions at 80% 1-RM. Four additional sets of 4 repetitions at 50% and 80% 1-RM were randomly performed with verbal instructions to isolate the chest muscles (chest instructed set, CIS) or to isolate the triceps muscles (triceps instructed set, TIS). Participants showed significantly higher LT activation during TIS compared to non-instructed set both at 50% (p=0.0199) and 80% 1-RM (p=0.0061) respectively. TIS elicited a significant (p=0.0250) higher activation of LT compared to CIS. Our results suggest that verbal instructions seem to be effective for increasing activity of the triceps brachii but not the pectoralis major during the bench press.

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Published
2019-06-12
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Original Articles
Keywords:
resistance training, bench press, mind-muscle connection, internal focus
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How to Cite
Paoli, A., Mancin, L., Saoncella, M., Grigoletto, D., Pacelli, F., Zamparo, P., Schoenfeld, B., & Marcolin, G. (2019). Mind-muscle connection: effects of verbal instructions on muscle activity during bench press exercise. European Journal of Translational Myology, 29(2). https://doi.org/10.4081/ejtm.2019.8250