Could inter-set stretching increase acute neuromuscular and metabolic responses during resistance exercise?

  • Ubitaran Contreira Padilha Physical Education College, University of Brasilia, DF, Brazil.
  • Amilton Vieira Physical Education College, University of Brasilia, DF, Brazil.
  • Denis César Leite Vieira | denisclvieira@hotmail.com Physical Education College, University of Brasilia, DF; Department of Physical Education, UDF - University, Brasilia, DF, Brazil.
  • Filipe Dinato De Lima Physical Education College, University of Brasilia, DF, Brazil.
  • Valdinar Araújo Rocha Junior National Police Academy, Brasilia, DF; Department of Electrical Engineering, University of Brasilia, DF, Brazil.
  • James J. Tufano Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic.
  • Martim Bottaro Physical Education College, University of Brasilia, DF, Brazil.

Abstract

This study investigated the acute effects of inter-set static stretching (ISS) during resistance exercise (RE) on the subsequent neuromuscular and metabolic responses. Twelve resistance-trained men performed three different knee extension RE protocols comprised of seven sets of 10 repetitions in a counterbalanced fashion. The three protocols were: 1) ISS (subjects performed 25 sec of quadriceps stretching between sets during 40 sec rest interval); 2) control (CON, subject passively rested between sets for 40 sec); 3) traditional (TRA, subject passively rested between sets for 120 sec). Total work was lower (p < 0.05) in ISS than CON and TRA (p <0.05). The fatigue index was greater (p < 0.05) in ISS compared with CON and TRA. ISS also resulted in lower (p < 0.05) electromyography (EMG) amplitude during the 6th and 7th sets compared with TRA. Additionally, EMG frequency was lower (p < 0.05) from the 3rd to 5th sets during ISS compared to CON, and from the 3rd to 7th sets compared to TRA. Muscle swelling and blood lactate similarly increased (p > 0.05) in response to all protocols. These results indicate that ISS negatively impacts neuromuscular performance, and does not increase the metabolic stress compared to passive rest intervals.

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Published
2019-11-12
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Issue
Section
Strength, Conditioning & Physical Exercise - Original Articles
Keywords:
inter-set static stretching, strength exercise, electromyography, training volume, muscle swelling
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How to Cite
Padilha, U., Vieira, A., Vieira, D., De Lima, F., Rocha Junior, V., Tufano, J., & Bottaro, M. (2019). Could inter-set stretching increase acute neuromuscular and metabolic responses during resistance exercise?. European Journal of Translational Myology, 29(4). https://doi.org/10.4081/ejtm.2019.8579