Gronwald T, et al. - By analyzing 11 relevant and eligible articles from PubMed and Scopus, researchers focused on the influences of acute dynamic endurance exercise on DFA (detrended fluctuation analysis)-alpha1 as a substitute of correlation properties in the heart rate time series. Findings from these studies revealed the adequacy of DFA-alpha1 of heart rate variability (HRV) for discriminating between various organismic demands during endurance exercise. Also, its possible utility for monitoring responses to various exercise intensities, movement frequencies, and exercise durations, was also suggested. In addition, the suitability of non-linear DFA of HRV as an analytical approach was highlighted, offering a differentiated and qualitative view of exercise physiology.