Resistance training with different repetition duration to failure: effect on hypertrophy, strength and muscle activation

PeerJ

article

Lucas Túlio Lacerda¹  Rodrigo Otávio Marra-Lopes¹  Marcel Bahia Lanza¹  Rodrigo César Ribeiro Diniz¹  Fernando Vitor Lima¹  Hugo Cesar Martins-Costa¹  Gustavo Ferreira Pedrosa¹  André Gustavo Pereira Andrade¹  Armin Kibele⁷  Mauro Heleno Chagas¹ 

[1] Weight Training Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Universidade Federal de Minas Gerais;Department of Physical Education and Sports;Universidade do Estado de Minas Gerais;Department of Physical Education, Pontifícia Universidade Católica de Minas Gerais;Department of Physical Therapy and Rehabilitation, School of Medicine, University of Maryland;Aeronautical Instruction and Adaptation Centre;Institute for Sports and Sport Science, University of Kassel

关键词: Repetition duration;    Muscle failure;    Muscle cross-sectional area;    Strength performance;    Training volume;    Time-under-tension;    Electromyography;   

DOI  :  10.7717/peerj.10909

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundThis study investigated the effects of two 14-week resistance training protocols with different repetition duration (RD) performed to muscle failure (MF) on gains in strength and muscle hypertrophy as well as on normalized electromyographic (EMG) amplitude and force-angle relationships.MethodsThe left and right legs of ten untrained males were assigned to either one of the two protocols (2-s or 6-s RD) incorporating unilateral knee extension exercise. Both protocols were performed with 3–4 sets, 50–60% of the one-repetition maximum (1RM), and 3 min rest. Rectus femoris and vastus lateralis cross-sectional areas (CSA), maximal voluntary isometric contraction (MVIC) at 30o and 90o of knee flexion and 1RM performance were assessed before and after the training period. In addition, normalized EMG amplitude-angle and force-angle relationships were assessed in the 6th and 39th experimental sessions.ResultsThe 6-s RD protocol induced larger gains in MVIC at 30o of knee angle measurement than the 2-s RD protocol. Increases in MVIC at 90o of knee angle, 1RM, rectus femoris and vastus lateralis CSA were not significant between the 2-s and 6-s RD protocols. Moreover, different normalized EMG amplitude-angle and force-angle values were detected between protocols over most of the angles analyzed.ConclusionPerforming longer RD could be a more appropriate strategy to provide greater gains in isometric maximal muscle strength at shortened knee positions. However, similar maximum dynamic strength and muscle hypertrophy gains would be provided by protocols with different RD.

【 授权许可】

CC BY