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The Dmax method is a valid procedure to estimate physical working capacity at fatigue threshold

  • Joshua J. Riffe
  • , Jeffrey R. Stout
  • , David H. Fukuda
  • , Edward H. Robinson
  • , Amelia A. Miramonti
  • , Kyle S. Beyer
  • , Ran Wang
  • , David D. Church
  • , Tyler W.D. Muddle
  • , Jay R. Hoffman

Research output: Contribution to journalArticlepeer-review

Abstract

Introduction: 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). Methods: 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 PWCFT using the Dmax method and the original (ORG) method. Results: There was a significant increase in PWCFT for 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). Conclusion: The Dmax method is sensitive to training and is a valid method for estimating PWCFT in young men and women. Muscle Nerve 55: 344–349, 2017.

Original languageEnglish
Pages (from-to)344-349
Number of pages6
JournalMuscle and Nerve
Volume55
Issue number3
DOIs
StatePublished - 1 Mar 2017
Externally publishedYes

Keywords

  • cycle ergometry
  • electromyography
  • neuromuscular fatigue
  • reproducibility
  • sensitivity
  • validity

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Physiology (medical)

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