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Repetitions to failure versus not to failure during concurrent training in healthy elderly men: A randomized clinical trial.
Exp Gerontol. 2018 07 15; 108:18-27.EG

Abstract

This randomized clinical trial compared the neuromuscular adaptations induced by concurrent training (CT) performed with repetitions to concentric failure and not to failure in elderly men. Fifty-two individuals (66.2 ± 5.2 years) completed the pre- and post-measurements and were divided into three groups: repetitions to failure (RFG, n = 17); repetitions not to failure (NFG, n = 20); and repetitions not to failure with total volume equalized to RFG (ENFG, n = 15). Participants were assessed in isometric knee extension peak torque (PTiso), maximal strength (1RM) in the leg press (LP) and knee extension (KE) exercises, quadriceps femoris muscle thickness (QF MT), specific tension, rate of torque development (RTD) at 50, 100 and 250 ms, countermovement jump (CMJ) and squat jump (SJ) performance, as well as maximal neuromuscular activity (EMGmax) of the vastus lateralis (VL) and rectus femoris (RF) muscles. CT was performed over 12 weeks, twice weekly. Along with each specific strength training program, each group also underwent an endurance training in the same session. After training, all groups improved similarly and significantly in LP and KE 1RM, PTiso, CMJ and SJ performance, RTD variables, specific tension, and VL EMGmax, (P < 0.05-0.001). QF MT improved only in RFG and ENFG (P < 0.01). These results suggest that repetitions until concentric failure does not provide further neuromuscular performance gains and muscle hypertrophy, and that even a low number of repetitions relative to the maximal possible (i.e., 50%) optimizes neuromuscular performance in elderly men. Moreover, training volume appears to be more important for muscle hypertrophy than training using maximal repetitions.

Authors+Show Affiliations

School of Physical Education, Physioteraphy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.School of Physical Education, Physioteraphy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.School of Physical Education, Physioteraphy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.School of Physical Education, Physioteraphy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.School of Physical Education, Physioteraphy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.School of Physical Education, Physioteraphy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.School of Physical Education, Physioteraphy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.Faculty of Physical Education, University of Brasilia, Brasilia, DF, Brazil.School of Physical Education, Physioteraphy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.Department of Health Sciences, Public University of Navarra, CIBERFES (CB16/10/00315), Pamplona, Navarre, Spain.School of Physical Education, Physioteraphy and Dance, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil. Electronic address: edcadore@yahoo.com.br.

Pub Type(s)

Comparative Study
Journal Article
Randomized Controlled Trial

Language

eng

PubMed ID

29577974

Citation

da Silva, Larissa Xavier Neves, et al. "Repetitions to Failure Versus Not to Failure During Concurrent Training in Healthy Elderly Men: a Randomized Clinical Trial." Experimental Gerontology, vol. 108, 2018, pp. 18-27.
da Silva LXN, Teodoro JL, Menger E, et al. Repetitions to failure versus not to failure during concurrent training in healthy elderly men: A randomized clinical trial. Exp Gerontol. 2018;108:18-27.
da Silva, L. X. N., Teodoro, J. L., Menger, E., Lopez, P., Grazioli, R., Farinha, J., Moraes, K., Bottaro, M., Pinto, R. S., Izquierdo, M., & Cadore, E. L. (2018). Repetitions to failure versus not to failure during concurrent training in healthy elderly men: A randomized clinical trial. Experimental Gerontology, 108, 18-27. https://doi.org/10.1016/j.exger.2018.03.017
da Silva LXN, et al. Repetitions to Failure Versus Not to Failure During Concurrent Training in Healthy Elderly Men: a Randomized Clinical Trial. Exp Gerontol. 2018 07 15;108:18-27. PubMed PMID: 29577974.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Repetitions to failure versus not to failure during concurrent training in healthy elderly men: A randomized clinical trial. AU - da Silva,Larissa Xavier Neves, AU - Teodoro,Juliana Lopes, AU - Menger,Erik, AU - Lopez,Pedro, AU - Grazioli,Rafael, AU - Farinha,Juliano, AU - Moraes,Kelly, AU - Bottaro,Martim, AU - Pinto,Ronei Silveira, AU - Izquierdo,Mikel, AU - Cadore,Eduardo Lusa, Y1 - 2018/03/22/ PY - 2018/03/01/received PY - 2018/03/12/revised PY - 2018/03/16/accepted PY - 2018/3/27/pubmed PY - 2019/5/6/medline PY - 2018/3/27/entrez KW - Aging KW - Combined training KW - Concurrent training KW - Maximal repetitions KW - Neuromuscular fatigue SP - 18 EP - 27 JF - Experimental gerontology JO - Exp. Gerontol. VL - 108 N2 - This randomized clinical trial compared the neuromuscular adaptations induced by concurrent training (CT) performed with repetitions to concentric failure and not to failure in elderly men. Fifty-two individuals (66.2 ± 5.2 years) completed the pre- and post-measurements and were divided into three groups: repetitions to failure (RFG, n = 17); repetitions not to failure (NFG, n = 20); and repetitions not to failure with total volume equalized to RFG (ENFG, n = 15). Participants were assessed in isometric knee extension peak torque (PTiso), maximal strength (1RM) in the leg press (LP) and knee extension (KE) exercises, quadriceps femoris muscle thickness (QF MT), specific tension, rate of torque development (RTD) at 50, 100 and 250 ms, countermovement jump (CMJ) and squat jump (SJ) performance, as well as maximal neuromuscular activity (EMGmax) of the vastus lateralis (VL) and rectus femoris (RF) muscles. CT was performed over 12 weeks, twice weekly. Along with each specific strength training program, each group also underwent an endurance training in the same session. After training, all groups improved similarly and significantly in LP and KE 1RM, PTiso, CMJ and SJ performance, RTD variables, specific tension, and VL EMGmax, (P < 0.05-0.001). QF MT improved only in RFG and ENFG (P < 0.01). These results suggest that repetitions until concentric failure does not provide further neuromuscular performance gains and muscle hypertrophy, and that even a low number of repetitions relative to the maximal possible (i.e., 50%) optimizes neuromuscular performance in elderly men. Moreover, training volume appears to be more important for muscle hypertrophy than training using maximal repetitions. SN - 1873-6815 UR - https://www.unboundmedicine.com/medline/citation/29577974/Repetitions_to_failure_versus_not_to_failure_during_concurrent_training_in_healthy_elderly_men:_A_randomized_clinical_trial_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0531-5565(18)30142-6 DB - PRIME DP - Unbound Medicine ER -