title: Test-retest reliability of the electromyographic fatigue threshold for cycle ergometry.
abstract: BACKGROUND
  The purpose of this study was to determine the intersession reliability of the electromyographic fatigue threshold (EMGFT ) for cycle ergometry.
  
  
  METHODS
  On separate occasions, 10 healthy, college-aged men performed an incremental test to voluntary exhaustion on a cycle ergometer. The EMG amplitude vs. time relationships for each power output from the quadriceps femoris muscles were analyzed using linear regression. EMGFT was defined operationally as the average of the highest power output that resulted in a non-significant slope coefficient (P >  0.05) and the lowest power output that resulted in a significant (P <  0.05) positive slope coefficient. The EMGFT values for trials 1 and 2 were used to calculate the intraclass correlation coefficient (ICC).
  
  
  RESULTS
  Overall, the reliability of the EMGFT (ICC2,1  = 0.85; 95% confidence interval 0.49-0.96) was in the "excellent" category.
  
  
  CONCLUSIONS
  The EMGFT for cycle ergometry is a reliable measure for assessing muscular fatigue.
authors.affiliation: Integrative Physiology of Exercise Laboratory.|Physical Therapy Program, Eugene Applebaum College of Pharmacy and Health Sciences, Department of Health Care Sciences, Wayne State University, Detroit, Michigan, USA.
authors.forename: Selim
authors.initials: S
authors.lastname: Mahmutović
authors.affiliation: Integrative Physiology of Exercise Laboratory.|Physical Therapy Program, Eugene Applebaum College of Pharmacy and Health Sciences, Department of Health Care Sciences, Wayne State University, Detroit, Michigan, USA.
authors.forename: Erick Y
authors.initials: EY
authors.lastname: Sprout
authors.affiliation: Integrative Physiology of Exercise Laboratory.|Physical Therapy Program, Eugene Applebaum College of Pharmacy and Health Sciences, Department of Health Care Sciences, Wayne State University, Detroit, Michigan, USA.
authors.forename: John C
authors.initials: JC
authors.lastname: Fontaine
authors.affiliation: Integrative Physiology of Exercise Laboratory.|Physical Therapy Program, Eugene Applebaum College of Pharmacy and Health Sciences, Department of Health Care Sciences, Wayne State University, Detroit, Michigan, USA.
authors.forename: Travis M
authors.initials: TM
authors.lastname: Buskirk
authors.affiliation: Physical Therapy Program, Eugene Applebaum College of Pharmacy and Health Sciences, Department of Health Care Sciences, Wayne State University, Detroit, Michigan, USA.
authors.forename: Sujay S
authors.initials: SS
authors.lastname: Galen
authors.affiliation: Integrative Physiology of Exercise Laboratory.|Physical Therapy Program, Eugene Applebaum College of Pharmacy and Health Sciences, Department of Health Care Sciences, Wayne State University, Detroit, Michigan, USA.
authors.forename: Moh H
authors.initials: MH
authors.lastname: Malek
mesh_terms: D000328:Adult; D004576:Electromyography; D016552:Ergometry; D005080:Exercise Test; D006801:Humans; D016014:Linear Models; D008297:Male; D018763:Muscle Fatigue / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology; D052097:Quadriceps Muscle / Q000502:physiology*; D015203:Reproducibility of Results; D055815:Young Adult
keywords: consistency; exercise; intraclass correlation; neuromuscular; statistics