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Items for "detrended fluctuation analysis"

Decreased Fractal Correlation in Diurnal Physical Activity in Chronic Fatigue Syndrome

OBJECTIVES: Our objectives were to study the temporal correlation of physical activity time series in patients with chronic fatigue syndrome (CFS) during normal daily life and to examine if it could identify the altered physical activity in these patients. METHODS: Fractal scaling exponents of diurnal and nocturnal physical activity time series in 10 CFS patients and 6 healthy control subjects (CON) were calculated by the detrended fluctuation analysis (DFA) and the wavelet transform modulus maxima (WTMM) method...

Keywords: Chronic fatigue syndrome, physical activity, detrended fluctuation analysis, wavelet transform modulus maxima method

01/2004 | Methods of Information in Medicine, Schattauer

Autonomic Imbalance Induced Breakdown of Long-range Dependence in Healthy Heart Rate

OBJECTIVES: The investigation of the relation between the long-range correlation property of heart rate and autonomic balance...

Keywords: Autonomic balance, long-range correlation, detrended fluctuation analysis

01/2007 | Methods of Information in Medicine, Schattauer

Long-range Correlated Glucose Fluctuations in Diabetes

OBJECTIVES: Our objective is to investigate diabetes-related alteration of glucose control in diurnal fluctuations in normal daily life by detrended fluctuation analysis (DFA)...

Keywords: Diabetes mellitus, continuous glucose monitoring system, detrended fluctuation analysis, positive /negative correlation

01/2007 | Methods of Information in Medicine, Schattauer

Changes in heart rate variability of athletes during a training camp

Heart rate variability (HRV) reflects regulatory processes of the cardiovascular system and reveals fractal characteristics...

Keywords: detrended fluctuation analysis, Heart rate variability, overtraining