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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Anaerobic Threshold by Mathematical Model in Healthy and Post-Myocardial Infarction Men

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Author(s):
Novais, L. D. [1, 2] ; Silva, E. [1] ; Simoes, R. P. [1] ; Sakabe, D. I. [1, 3] ; Martins, L. E. B. [4] ; Oliveira, L. [1] ; Diniz, C. A. R. [5] ; Gallo, L. [6] ; Catai, A. M. [1]
Total Authors: 9
Affiliation:
[1] Fed Univ Sao Carlos UFSCar, Dept Phys Therapy, Cardiovasc Phys Therapy Lab, Nucl Res Phys Exercise, Sao Carlos, SP - Brazil
[2] Univ Fed Triangulo Mineiro, Dept Phys Therapy, Uberaba, MG - Brazil
[3] Integrated Coll Einstein Limeira, Dept Phys Therapy, Limeira, SP - Brazil
[4] Univ Estadual Campinas, Fac Phys Educ, Exercise Physiol Lab, Campinas, SP - Brazil
[5] Univ Fed Sao Carlos, Dept Stat, BR-13560 Sao Carlos, SP - Brazil
[6] Univ Sao Paulo, Dept Clin Med, Exercise Physiol Lab, Div Cardiol, Fac Med Ribeirao Preto, BR-14049 Ribeirao Preto - Brazil
Total Affiliations: 6
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF SPORTS MEDICINE; v. 37, n. 2, p. 112-118, FEB 2016.
Web of Science Citations: 4
Abstract

The aim of this study was to determine the anaerobic threshold (AT) in a population of healthy and post-myocardial infarction men by applying Hinkley's mathematical method and comparing its performance to the ventilatory visual method. This mathematical model, in lieu of observer-dependent visual determination, can produce more reliable results due to the uniformity of the procedure. 17 middle-aged men (55 +/- 3 years) were studied in 2 groups: 9 healthy men (54 +/- 2 years); and 8 men with previous myocardial infarction (57 +/- 3 years). All subjects underwent an incremental ramp exercise test until physical exhaustion. Breath-by-breath ventilatory variables, heart rate (HR), and vastus lateralis surface electromyography (sEMG) signal were collected throughout the test. Carbon dioxide output (VCO2), HR, and sEMG were studied, and the AT determination methods were compared using correlation coefficients and Bland-Altman plots. Parametric statistical tests were applied with significance level set at 5%. No significant differences were found in the HR, sEMG, and ventilatory variables at AT between the different methods, such as the intensity of effort relative to AT. Moreover, important concordance and significant correlations were observed between the methods. We concluded that the mathematical model was suitable for detecting the AT in both healthy and myocardial infarction subjects. (AU)