Effects of Pre-exhaustion Versus Traditional Resistance Training on Training Volume, Maximal Strength, and Quadriceps Hypertrophy.

Autor:	Trindade TB; Graduation Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., Prestes J; Graduation Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., Neto LO; Department of Arts, Federal University of Rio Grande do Norte, Natal, Brazil., Medeiros RMV; Department of Physical Education, Federal University of Rio Grande do Norte, Natal, Brazil., Tibana RA; Graduation Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., de Sousa NMF; Faculdade Estácio de Sá de Vitória, Espírito Santo, Brazil., Santana EE; Graduation Program in Physical Education, Federal University of Rio Grande do Norte, Natal, Brazil., Cabral BGAT; Graduation Program in Physical Education, Federal University of Rio Grande do Norte, Natal, Brazil., Stone WJ; School of Nutrition, Kinesiology, and Psychological Sciences, University of Central Missouri, Warrensburg, MO, United States., Dantas PMS; Graduation Program in Physical Education, Federal University of Rio Grande do Norte, Natal, Brazil.
Jazyk:	angličtina
Zdroj:	Frontiers in physiology [Front Physiol] 2019 Nov 19; Vol. 10, pp. 1424. Date of Electronic Publication: 2019 Nov 19 (Print Publication: 2019).
DOI:	10.3389/fphys.2019.01424
Abstrakt:	Background: The pre-exhaustion (PreEx) method is used as a resistance training (RT) method to increase muscle mass, yet the chronic effects of this method are poorly understood. Objective: Although readily prescribed as a RT method for promotion of muscle hypertrophy, few researches give light to gains made after chronic PreEx RT. Therefore, we compared the effects of traditional versus PreEx RT programs on muscle strength, body composition, and muscular hypertrophy in adult males. Methods: Untrained subjects (age: 31.37 ± 6.83 years; height: 175.29 ± 5.52 cm; body mass: 82.04 ± 13.61 kg; 1RM leg press: 339.86 ± 61.17 kg; 1RM leg extension: 121.71 ± 11.93 kg) were submitted to 9 weeks of RT with weekly sessions. Traditional (TRT) group ( n = 12) performed three sets at 45° of leg press exercise at 75% of 1RM, PreEx group ( n = 12) completed a set to failure on a leg extension machine prior to the leg press, and the control (CON) group ( n = 7) did not train. Maximum strength, muscle thickness, and body composition were analyzed. Results: PreEx group increased in maximal strength on leg press (16 ± 8%) and leg extension (17 ± 11%), while the TRT group improved by 15 ± 9 and 11 ± 4%, respectively. The thickness of the quadriceps muscles increased for both intervention groups. Specifically, the post-training thickness of the vastus lateralis was significantly higher for PreEx (55%) compared to the CON group. The TRT group presented a greater loss of total and thigh fat mass when compared with the PreEx method. These results were found in the presence of a lower training load for the PreEx group. Conclusion: The PreEx training can decrease the total training volume while maintaining results in strength and hypertrophy when comparing to TRT. However, TRT may be optimal if the goal is to decrease fat mass. (Copyright © 2019 Trindade, Prestes, Neto, Medeiros, Tibana, de Sousa, Santana, Cabral, Stone and Dantas.)
Databáze:	MEDLINE
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