Identification of anaerobic threshold during dynamic exercise in healthy men using kolmogorov-sinai entropy

During dynamic physical exercise there is a changing point in physiological state called Anaerobic Threshold (AT). Some respiratory and cardiovascular variables, including heart rate variability (HRV), experiment substantial changes at this point. In this work we measure the AT using Kolmogorov-Sinai Entropy applied to HRV time series. This procedure has two major advantage: a) it is non-invasive and b) it requests low cost equipments. The study also includes the comparison of AT values obtained by the mentioned method with another one obtained through a statistical analysis using the Auto Regressive Integrated Moving Average model