Correlation between heart rate and performance during Olympic windsurfing competition

Correlation between low T3 syndrome and mortality rate in patients with systolic heart failure

Introduction: This study was performed to evaluate the prevalence of low T3 syndrome among patients with heart failure and to assess the correlation between decreased level of tri iodothyronin (T3) with mortality rate. Methods: In a prospective cross-sectional study, 91 patients with systolic heart failure were admitted to Mohammadi hospital in Bandar Abbas in 2008.Thyroid function test w...

Heart rate monitoring during training and competition in cyclists.

To obtain optimal training effects and avoid overtraining, it is necessary to monitor the intensity of training. In cycling, speed is not an accurate indicator of exercise intensity, and therefore alternatives have to be found to monitor exercise intensity during training and competition. Power output may be the most direct indicator, but heart rate is easier to monitor and measure. There are, ...

Inverse Correlation between Heart Rate Variability and Heart Rate Demonstrated by Linear and Nonlinear Analysis

The dynamical fluctuations in the rhythms of biological systems provide valuable information about the underlying functioning of these systems. During the past few decades analysis of cardiac function based on the heart rate variability (HRV; variation in R wave to R wave intervals) has attracted great attention, resulting in more than 17000-publications (PubMed list). However, it is still cont...

Performance criteria, telemetered heart rate and enzyme studies in Olympic weight lifting.

Correlation between mood and heart rate variability indices during daily life

We investigated the correlation between mood and heart rate variability (HRV) indices during daily life. The RR-interval and body acceleration of 40 normal male subjects were recorded using ambulatory device for 48 to 72 hours. Every hour that the subjects were awake they registered their current mood on a Visual Analogue Scale questionnaire. The questionnaire scales eight of the subjects’ curr...