title: Effect of the rest interval duration between contractions on muscle fatigue.
abstract: BACKGROUND
  We aimed to investigate the effect of rest interval, between successive contractions, on muscular fatigue.
  
  
  METHODS
  Eighteen subjects performed elbow flexion and extension (30 repetitions) on an isokinetic dynamometer with 80º of range of motion. The flexion velocity was 120º/s, while for elbow extension we used 5 different velocities (30, 75, 120, 240, 360º/s), producing 5 different rest intervals (2.89, 1.28, 0.85, 0.57 and 0.54 s).
  
  
  RESULTS
  We observed that when the rest interval was 2.89 s there was a reduction in fatigue. On the other hand, when the rest interval was 0.54 s the fatigue was increased.
  
  
  CONCLUSIONS
  When the resting time was lower (0.54 s) the decline of work in the flexor muscle group was higher compared with different rest interval duration.
authors.affiliation: Universidade do Vale do Paraíba-UNIVAP/Grupo de Instrumentação e Processamento de Sinais-GIPSI, IP&D, Rua Tertuliano Delphim Jr, 181 São José dos Campos, São Paulo 12246-080, Brazil.
authors.forename: Daniel V
authors.initials: DV
authors.lastname: Nogueira
authors.forename: Sidney B
authors.initials: SB
authors.lastname: Silva
authors.forename: Luiz Carlos
authors.initials: LC
authors.lastname: de Abreu
authors.forename: Vitor E
authors.initials: VE
authors.lastname: Valenti
authors.forename: Mahmi
authors.initials: M
authors.lastname: Fujimori
authors.forename: Carlos Bandeira
authors.initials: CB
authors.lastname: de Mello Monteiro
authors.forename: Charli
authors.initials: C
authors.lastname: Tortoza
authors.forename: Wellington
authors.initials: W
authors.lastname: Ribeiro
authors.forename: Rodrigo A
authors.initials: RA
authors.lastname: Lazo-Osório
authors.forename: Carlos J
authors.initials: CJ
authors.lastname: Tierra-Criollo
mesh_terms: D000293:Adolescent; D000328:Adult; D004550:Elbow; D006801:Humans; D008297:Male; D009119:Muscle Contraction; D018763:Muscle Fatigue; D012146:Rest; D013997:Time Factors; D055815:Young Adult