The purpose of this study was to compare and evaluate the measures of anaerobic threshold(AT) estimated by Ventilatory(VT) and EMG methods, and conducted as a follow-up study of "An alternative determination for Anaerobic Threshold: Empirical comparis ...
The purpose of this study was to compare and evaluate the measures of anaerobic threshold(AT) estimated by Ventilatory(VT) and EMG methods, and conducted as a follow-up study of "An alternative determination for Anaerobic Threshold: Empirical comparisons of ventilation threshold and EMG (Kang & Eom, 2006). The estimates of AT was obtained using 5 different filtering intervals (9sec, 15sec, 20sec, 25sec, and 30sec.) from the two methods. Seventy-one subjects in total (36 ordinary people, 35 university athletes 35). Various statistical procedures such as a 3-way ANOVA with repeated measures on the last factor, correlations, a three-faceted crossed design of G-theory model, and Bland-Altman confidence interval approach, were employed to compute the necessary statistics using SPSS 11.0 program. From the results of these analyses the following conclusions were obtained. The overall mean value of the athletes group was significant higher than the ordinary group; however, none of the other effects, including all two-way and a three-way interaction effects, was statistically significant. These results indicated that the estimates of AT by VT and EMG methods were fairly comparable and stable across the five filtering intervals. The values of correlation coefficients between AT and EMG estimates were statistically significant and substantially high in size, in general. However, the correlations for the intervals 9 sec. and 15 sec., were relatively a bit smaller, compared to those for the other filtering intervals. And this was especially so when the correlations were computed among the AT estimates of five filtering intervals. In summary, the results of this study revealed that the AT estimates produced by EMG method at various filtering time intervals were very similar in size with those of VT method, suggesting that the EMG estimate, which is an oxygen-free threshold, can be used as a substitute for the VT threshold estimate, and be utilized more efficiently and objectively in a research and/or field setting.