Profile: MetriSense, Inc. distributes life science research products. Our products offer solutions for sensing and measuring human physiological signals & waveforms. Actiheart® monitors and records heart rate, movement, caloric expenditure, heart inter-beat-interval & heart rate variability. Actiwave™ records ECG, EEG and EMG waveforms. Our products are applicable for both personal well-being and basic physiological & life sciences research. Actiheart is a compact, chest-worn device that records heart rate, inter-beat-interval (IBI) and physical activity. It 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. The Actiwave family of miniature physiological waveform recorders is designed to capture EMG, EEG and ECG signals in daily life. Using ultra-miniature recorders that are available with 1, 2, & 4 channels of recording capability, EMG, EEG and ECG waveforms can be recorded inconspicuously without the need for a large belt-mounted recorder/lengthy wires. Each recorder can simply be taped to the skin using medical tape/adhered to the skin with EEG tack, close to the position of the electrodes. The very small size and weight of these recorders makes them ideal for various age groups & pre-clinical investigations.