title: The Dmax method is a valid procedure to estimate physical working capacity at fatigue threshold.
abstract: The purpose of this study was to determine the validity of the maximal distance-electromyography (Dmax-EMG) method for estimating physical working capacity at fatigue threshold (PWCFT).
  
  
  
  Twenty-one men and women (age 22.9 ± 3.0 years) volunteered to perform 12 sessions of high-intensity interval training (HIIT) over 4 weeks. Before and after HIIT training, a graded exercise test (GXT) was used to estimate PWCFTusing the Dmax method and the original (ORG) method.
  
  
  
  There was a significant increase in PWCFTfor both ORG (+10.6%) and Dmax (+12.1%) methods, but no significant difference in the change values between methods. Further, Bland-Altman analyses resulted in non-significant biases (ORG-Dmax) between methods at pre-HIIT (-6.4 ± 32.5 W; P > 0.05) and post-HIIT (-4.2 ± 33.1 W; P > 0.05).
  
  
  
  The Dmax method is sensitive to training and is a valid method for estimating PWCFTin young men and women. Muscle Nerve 55: 344-349, 2017.
authors.affiliation: Institute of Exercise Physiology & Wellness, University of Central Florida, P.O. Box 161250, Orlando, Florida, 32816-1250, USA.
authors.forename: Joshua J
authors.initials: JJ
authors.lastname: Riffe
authors.affiliation: Institute of Exercise Physiology & Wellness, University of Central Florida, P.O. Box 161250, Orlando, Florida, 32816-1250, USA.
authors.forename: Jeffrey R
authors.initials: JR
authors.lastname: Stout
authors.affiliation: Institute of Exercise Physiology & Wellness, University of Central Florida, P.O. Box 161250, Orlando, Florida, 32816-1250, USA.
authors.forename: David H
authors.initials: DH
authors.lastname: Fukuda
authors.affiliation: Department of Nutrition, Health, and Human Performance, Meredith College, Raleigh, North Carolina, USA.
authors.forename: Edward H
authors.initials: EH
authors.lastname: Robinson
authors.affiliation: Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
authors.forename: Amelia A
authors.initials: AA
authors.lastname: Miramonti
authors.affiliation: Institute of Exercise Physiology & Wellness, University of Central Florida, P.O. Box 161250, Orlando, Florida, 32816-1250, USA.
authors.forename: Kyle S
authors.initials: KS
authors.lastname: Beyer
authors.affiliation: Institute of Exercise Physiology & Wellness, University of Central Florida, P.O. Box 161250, Orlando, Florida, 32816-1250, USA.
authors.forename: Ran
authors.initials: R
authors.lastname: Wang
authors.affiliation: Institute of Exercise Physiology & Wellness, University of Central Florida, P.O. Box 161250, Orlando, Florida, 32816-1250, USA.
authors.forename: David D
authors.initials: DD
authors.lastname: Church
authors.affiliation: Institute of Exercise Physiology & Wellness, University of Central Florida, P.O. Box 161250, Orlando, Florida, 32816-1250, USA.
authors.forename: Tyler W D
authors.initials: TW
authors.lastname: Muddle
authors.affiliation: Institute of Exercise Physiology & Wellness, University of Central Florida, P.O. Box 161250, Orlando, Florida, 32816-1250, USA.
authors.forename: Jay R
authors.initials: JR
authors.lastname: Hoffman
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D004576:Electromyography; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D018763:Muscle Fatigue / Q000502:physiology*; D010806:Physical Education and Training; D010808:Physical Examination; D014938:Work Capacity Evaluation; D055815:Young Adult
keywords: cycle ergometry; electromyography; neuromuscular fatigue; reproducibility; sensitivity; validity