The Reproducibility and Validity of Using the Dmax Method to Predict Physical Working Capacity at Fatigue Threshold

摘要: Although the original (ORG) physical working capacity at fatigue threshold (PWCFT) assessment has demonstrated strong reliability and sensitivity to training and/or nutritional interventions, limitations may exist regarding method of PWCFT estimation. However, a relatively new mathematical method, called Dmax, been shown be objective reliable when estimating metabolic neuromuscular thresholds. To date, however, no study examined whether Dmax for work rate is similar ORG method. PURPOSE: The purpose this evaluate validity Dmax-EMG tracking changes in PWCFT. METHODS: In reproducibility study, 11 men (age: 21.9 ± 1.37 years; height: 175.6 8.65 cm; body mass: 82.1 13.92 kg) completed two incremental exercise tests (GXT) exhaustion on nonconsecutive days. active 23.4 3.0 177.9 7.8 80.9 10.7 10 women 22.3 3.1 166.6 9.5 62.8 8.7 volunteered perform 12 sessions high-intensity interval (HIIT) over 4-weeks along with preand post-training GXT compare RESULTS: revealed significant differences between first (181.5 29.2 W) second (181.9 26.18 trials (p = 0.87). addition, ICC3,1 resulted 0.949 an SEM 6.28 W MD 17.41 W. crossvalidation, CE actual predicted was not statistically different pre (-6.7 W; p > 0.05) or post (-7.2 0.05). Pre (r 0.87) 0.84) coefficients were considered very TE values 30.8 32.5 W, respectively. Wide limits agreement calculated Bland-Altman analyses (pre: 68.36 54.93 post: -57.77 72.06 biases both