In this work we present a quantitative approach to the analysis of cardiorespiratory synchronization, which is a newly discovered phenomenon. The primary aim of this stu+ is to determine whether cardiorespiratory synchronization is a real phenomenon or a random one. We utilized the surrogate data analysis approach. A surrogate data set was constructed ji-om recordings of ECG and respiration obt...

Cardiac and respiratory rhythms reveal transient phases of phase-locking which were proposed to be an important aspect of cardiorespiratory interaction. The aim of this study was to quantify cardio-respiratory phase-locking in obstructive sleep apnea (OSA). We investigated overnight polysomnography data of 248 subjects with suspected OSA. Cardiorespiratory phase-coupling was computed from the R...

BACKGROUND UK fire services have differing practices relating to the use of a cardiorespiratory fitness standard as a selection criterion for recruits. AIMS To establish whether a reduction in, or elimination of, a defined cardiorespiratory standard for firefighter recruitment impacted on a number of occupational and health-related outcomes. METHODS Data were collected on firefighter recrui...

BACKGROUND Children with cerebral palsy (CP) have poor cardiorespiratory fitness in comparison to their peers with typical development, which may be due to low levels of physical activity. Poor cardiorespiratory fitness may contribute to increased cardiometabolic risk. PURPOSE The aim of this study was to determine the association between sedentary behaviour, physical activity and cardiorespi...

OBJECTIVES To investigate gender-specific relationships between cardiorespiratory fitness and factors that predict the development of diabetes and to identify the risk factors that predict fasting plasma glucose and 2-hour plasma glucose levels. INTRODUCTION Different risk factors (e.g., low cardiorespiratory fitness) may cause elevated plasma glucose levels in men compared to women. Therefor...

Five hundred patients with the isomorphic pattern of the isoenzymes of serum lactate dehydrogenase (LDH) were surveyed. The isomorphic pattern of LDH isoenzymes is defined as a significant increase of total LDH with normal or low percentage of individual fractions, but with the LDH1:2 ratio less than unity. Diagnoses were, in descending order of frequency, cardiorespiratory diseases, malignancy...

Athletes use nutritional supplementation to enhance the effects of training and achieve improvements in their athletic performance. Beetroot juice increases levels of nitric oxide (NO), which serves multiple functions related to increased blood flow, gas exchange, mitochondrial biogenesis and efficiency, and strengthening of muscle contraction. These biomarker improvements indicate that supplem...

To verify the relationship between cardiorespiratory fitness and body fat in women. Evaluations were performed on 229 women with ages ranging between 50 and 84 years. Anthropometric assessment was performed and waist/hip ratio and conicity index values were obtained. The cardiorespiratory fitness was evaluated by the six minutes walk test and one pedometer was used to evaluate the speed, length...

We use the empirical mode decomposition method to decompose experimental respiratory signals into a set of intrinsic mode functions (IMFs), and consider one of these IMFs as a respiratory rhythm. We then use the Hilbert spectral analysis to calculate the instantaneous phase of the IMF. Heartbeat data are finally incorporated to construct the cardiorespiratory synchrogram, which is a visual tool...