Strength training with repetitions to failure does not provide additional strength and muscle hypertrophy gains in young women

  • Saulo Martorelli | martorelli.saulo@gmail.com College of Physical Education, University of Brasilia, Brasilia, DF, Brazil.
  • Eduardo Lusa Cadore School of Physical Education, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
  • Mikel Izquierdo Department of Health Sciences, Public University of Navarre, Campus de Tudela, Tudela, Navarre, Spain.
  • Rodrigo Celes College of Physical Education, University of Brasilia, Brasilia, DF, Brazil.
  • André Martorelli College of Physical Education, University of Brasilia, Brasilia, DF; Federal Institute of Goias (IFG), Valparaiso, GO, Brazil.
  • Vitor Alonso Cleto College of Physical Education, University of Brasilia, Brasilia, DF, Brazil.
  • José Gustavo Alvarenga College of Physical Education, University of Brasilia, Brasilia, DF, Brazil.
  • Martim Bottaro College of Physical Education, University of Brasilia, Brasilia, DF, Brazil.

Abstract

This study investigated the effects of a 10-week resistance training to failure on neuromuscular adaptations in young women. Eighty-nine active young women were randomly assigned to one of three groups: 1) repetitions to failure (RF; three sets of repetitions to failure); 2) repetitions not to failure with equalized volume (RNFV; four sets of 7 repetitions); and 3) repetitions not to failure (RNF; three sets of 7 repetitions). All groups performed the elbow flexor exercise (bilateral biceps curl) and trained 2 days per week using 70% of 1RM. There were significant increases (p<0.05) in muscle strength after 5 (15.9% for RF, 18.4% for RNF, and 19.9% for RNFV) and 10 (28.3% for RF, 26.8% for RNF, and 28.3% for RNFV) weeks of training, with no significant differences between groups. Additionally, muscular endurance increased after 5 and 10 weeks, with no differences between groups. However, peak torque (PT) increased significantly at 180°.s-1 in the RNFV (13.7%) and RNF (4.1%) groups (p<0.05), whereas no changes were observed in the RF group (-0.5%). Muscle thickness increased significantly (p<0.05) in the RF and RNFV groups after 5 (RF: 8.4% and RNFV: 2.3%) and 10 weeks of training (RF: 17.5%, and RNFV: 8.5%), whereas no significant changes were observed in the RNF group (3.9 and 2.1% after 5 and 10 weeks, respectively). These data suggest that short-term training of repetitions to failure do not yield additional overall neuromuscular improvements in young women.

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Published
2017-06-27
Info
Issue
Section
Original Articles
Supporting Agencies
Council for the Research Development (CNPq), Coordination for the Improvement of Higher Level Personnel (Capes)
Keywords:
Strength training to failure, Muscle hypertrophy, Young women, Fatigue, Maximum exercise
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How to Cite
Martorelli, S., Cadore, E. L., Izquierdo, M., Celes, R., Martorelli, A., Cleto, V. A., Alvarenga, J. G., & Bottaro, M. (2017). Strength training with repetitions to failure does not provide additional strength and muscle hypertrophy gains in young women. European Journal of Translational Myology, 27(2). https://doi.org/10.4081/ejtm.2017.6339