10 Apparatus, for medical use, for achieving physical fitness, namely, medical apparatus incorporating sensors for measuring physiological parameters of the body; measuring devices for physiological variables, namely, medical devices incorporating sensors for measuring variables relating to the nervous system, neurology, cardiology and physiology, and parts thereof; medical instruments for recording physiological data, namely, instruments incorporating sensors for measuring and recording blood pressure, heart-rate, heart-rate variability, oxygen-saturation, CO2 levels, respiration rates, or temperature, EEG (electroencephalogram), EMG (electromyogram), SaO2 (oxygen saturation); medical instruments for recording physiological data, namely, instruments incorporating sensors for acquiring and analysing data representative of physiological signals and states; physiological apparatus for medical use, namely, medical apparatus for measuring blood pressure, heart-rate, heart-rate variability, oxygen-saturation, CO2 levels, respiration rates, or temperature, EEG, EMG, SaO2; physiological monitoring apparatus for medical use, namely, medical apparatus incorporating sensors for measuring voltages, current, magnetic oximetry, temperature, galvanic skin-resistance, movement, activity, or position; physiological monitoring apparatus for medical use, namely, medical apparatus incorporating sensors for measuring variables relating to the nervous system, cardiology and physiology, and parts thereof; physiological monitoring apparatus for medical use, namely, medical monitoring apparatus incorporating EEG sensors, EMG sensors, EOG sensors, conductivity sensors, temperature sensors, pressure sensors; apparatus for medical diagnostic purposes, namely, medical apparatus for monitoring sleep-staging, sleep-scoring, heart rate, blood oxygenation, brain function, and for acquiring physiological and data files featuring acquired, transformed, communicated, and displayed data relating to physiological processes, particularly sleep variables, sleep-staging, sleep-scoring, breathing patterns, heart rate, blood oxygenation and brain function; diagnostic measuring apparatus for medical use, namely, apparatus incorporating sensors for measuring and recording blood pressure, heart-rate, heart-rate variability, oxygen-saturation, CO2 levels, respiration rates, or temperature, EEG, EMG, SaO2 for measuring sleep parameters