indicates the signal at any given point exhibits dependence upon previous and future states. Figure 5 —Illustration of detrended fluctuation analysis (DFA) method on a biophysical signal (here, stride interval). The signal is sectioned into nonoverlapping windows of varying sizes; here illustrated as 10
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Fractal Dynamics, Variability, and Coordination in Human Locomotion
Scott W. Ducharme and Richard E.A. van Emmerik
Comparison of Linear and Nonlinear HRV Dynamics Across Exercise Intensities After Menopause
Julia C. Orri, Elizabeth M. Hughes, Deepa G. Mistry, and Antone Scala
( 2006 ) demonstrated that detrended fluctuation analysis (DFA) α1 was reduced in older participants, with females lower than males ( Beckers et al., 2006 ). They concluded that the decrease in DFA α1 can lead to changes in vagal control and potentially increase arrhythmia risk. A Poincaré plot measure
A Mathematical Model to Examine Issues Associated With Using Portable Force-Measurement Technologies to Collect Infant Postural Data
James R. Chagdes, Joshua J. Liddy, Amanda J. Arnold, Laura J. Claxton, and Jeffrey M. Haddad
( Deffeyes, Harbourne, Stuberg, & Stergiou, 2011 ), or detrended fluctuation analysis ( Deffeyes, Kochi, et al., 2009 ) should be cautiously considered if data is collected from a non-research grade device. These outcome metrics each have their own limitations that have been outlined in previous publications
Adolescents’ Postural Control Learning According to the Frequency of Knowledge of Process
Julián Gandía, Xavier García-Massó, Adrián Marco-Ahulló, and Isaac Estevan
, the larger the neuromuscular activity ( Paillard & Noé, 2015 ). Moreover, we assessed the temporal dynamics of sway using detrended fluctuation analysis (DFA). Specifically, the α-scaling exponent in medio-lateral direction was computed. This variable provides information about the long
North American Society for the Psychology of Sport and Physical Activity
North American Society for the Psychology of Sport and Physical Activity
Hemodynamic Function of Forearm Muscle in Postmenopausal Women With Type 2 Diabetes
Luca Pollonini, Lauren Gulley Cox, and Stacey L. Gorniak
a 2-min resting period between trials, with more rest given when requested by the participant. The structure of force output variability and hemodynamic function variability was quantified via approximate entropy (ApEn) and detrended fluctuation analysis. Further analysis of the correlation among
Biomechanics: 40 Years On
Joseph Hamill, Kathleen M. Knutzen, and Timothy R. Derrick
biomechanics and motor control research, including the analysis of, for example, relative phase ( Ferber et al., 2005 ), fractal properties ( Duarte & Zatsiorsky, 2000 ), the uncontrolled manifold concept ( Scholz & Schöner, 1999 ), maximum Floquet multipliers ( Dingwell et al., 2007 ), detrended fluctuation
Can Insoles Be Used to Improve Static and Dynamic Balance of Community-Dwelling Older Adults? A Systematic Review on Recent Advances and Future Perspectives
Christina Zong-Hao Ma, Wing-Kai Lam, Bao-Chi Chang, and Winson Chiu-Chun Lee
). Using detrended fluctuation analysis (DFA) to analyze whether vibratory insoles enhance balance stability for elderly fallers . Archives of Gerontology and Geriatrics, 55 ( 3 ), 673 – 676 . doi:10.1016/j.archger.2011.11.008 PubMed ID: 22169622 10.1016/j.archger.2011.11.008 Wei , Q. , Liu , D