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fDesc[0] = "Actiheart is a compact, chest-worn device that records heart rate, inter-beat-interval (IBI), and physical activity. Actiheart digitizes the ECG signal and determines the IBI from the R-to-R interval. Through the use of a software program, the user configures the device for data recording. At the time of configuration, the user may determine which combinations of IBI, Heart Rate, and Activity to record on board the monitor for later download. Following the recording session, the data are transferred to the computer for storage, viewing, and analysis. From the IBI recordings, the heart rate and heart rate variability parameters are calculated. Caloric expenditure can be obtained through the use of a software algorithm that combines concurrent heart rate and activity data. Actiheart is the new gold standard for measuring energy expenditure and has been validated against doubly labeled water (publication in press).";

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