title: Peripheral and central fatigue after high intensity resistance circuit training.
abstract: The aim of this study was to investigate the effects of high intensity resistance circuit (HIRC) and traditional strength training (TST) on neuromuscular fatigue and metabolic responses.
  
  
  
  Twelve trained young subjects performed HIRC and TST in a counterbalanced order with 1 week rest in-between. The amount of workload and the inter-set time for each local muscle group were matched (180 s), however, the time between successive exercises differed. The twitch interpolation technique was used to test neuromuscular function of the knee extensor muscles. Blood lactate concentration was used to evaluate metabolic responses.
  
  
  
  Maximum voluntary contraction and resting potentiated twitch amplitude (Qtw) were significantly reduced after HIRC, but there were not changes after TST, while reductions in voluntary activation were similar. Lactate concentration increased significantly more after HIRC.
  
  
  
  The higher lactate concentration after HIRC probably impaired excitation-contraction coupling, indicating larger peripheral fatigue than after TST. Muscle Nerve 56: 152-159, 2017.
authors.affiliation: Department of Physical Education and Sport, Faculty of Sport Sciences, Catholic University of Murcia (UCAM), Murcia, Spain.
authors.forename: Gonzalo
authors.identifier: 0000-0002-2305-5229
authors.initials: G
authors.lastname: Márquez
authors.affiliation: Department of Physical Education and Sport, Faculty of Sport Sciences, Catholic University of Murcia (UCAM), Murcia, Spain.
authors.forename: Salvador
authors.initials: S
authors.lastname: Romero-Arenas
authors.affiliation: Research Center for High Performance Sport. Catholic University of Murcia (UCAM), Murcia, Spain.
authors.forename: Cristian
authors.initials: C
authors.lastname: Marín-Pagán
authors.affiliation: Department of Physical Education and Sport, Faculty of Sport Sciences, Catholic University of Murcia (UCAM), Murcia, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: Vera-Ibañez
authors.affiliation: Learning and Human Movement Control Group, Department of Physical Education and Sport, Faculty Sport Sciences and Physical Activity, University of A Coruña, A Coruña, Spain.
authors.forename: Miguel
authors.initials: M
authors.lastname: FernáNdez Del Olmo
authors.affiliation: Department of Medicine, Movement and Sports Science, University of Fribourg, Fribourg, Switzerland.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Taube
mesh_terms: D016022:Case-Control Studies; D002524:Cerebellar Ataxia / Q000150:complications / Q000000981:diagnostic imaging / Q000534:rehabilitation*; D065327:Circuit-Based Exercise / Q000379:methods*; D005260:Female; D006801:Humans; D019344:Lactic Acid / Q000378:metabolism; D008297:Male; D008475:Median Nerve / Q000000981:diagnostic imaging; D018763:Muscle Fatigue / Q000502:physiology*; D014459:Ulnar Nerve / Q000000981:diagnostic imaging; D015837:Vestibular Diseases / Q000150:complications / Q000000981:diagnostic imaging / Q000534:rehabilitation
chemical_list: D019344:Lactic Acid
keywords: fatigue; metabolic response; neuromuscular function; perception of effort; resistance training; twitch interpolation technique