A wearable monitoring apparatus for monitoring at least one dielectric related properties of an internal tissue of an ambulatory user, comprising: one or more electromagnetic transducers (401, 452) adapted to: deliver one or more stable frequency continuous wave radio signals to the internal tissue in the thorax and intercept said one or more stable frequency CW radio signals from said internal tissue in a plurality of transmission sessions during a period of at least 24 hours; a processing unit adapted to: analyze one or more of the intercepted one or more stable CW radio signals of said one or more EM transducers for sensing a change over time of at least one of a phase and an amplitude of said intercepted one or more stable frequency CW radio signals, and a measuring dielectric properties unit adapted to calculate dielectric related properties of internal tissues or organs based on said change; a reporting unit adapted to generate a report of said dielectric related properties; a housing adapted to contain said one or more EM transducers (401, 452), said reporting unit, and said processing unit, said housing is configured for being disposed on the body of the ambulatory user; characterised in that the processing unit is further adapted to extract one or more functionality features indicative to the posture from said intercepted one or more stable frequency CW signals and to classify the posture of the monitored user by matching said one or more extracted functionality features with reference features from a posture bank associated to selected postures, wherein said classified posture is used by the measuring dielectric properties unit for reducing the effect of the posture on the calculations of said dielectric related properties of internal tissues or organs. one or more electromagnetic transducers (401, 452) adapted to: deliver one or more stable frequency continuous wave radio signals to the internal tissue in the thorax and intercept said one or more stable frequency CW radio signals from said internal tissue in a plurality of transmission sessions during a period of at least 24 hours; a processing unit adapted to: analyze one or more of the intercepted one or more stable CW radio signals of said one or more EM transducers for sensing a change over time of at least one of a phase and an amplitude of said intercepted one or more stable frequency CW radio signals, and a measuring dielectric properties unit adapted to calculate dielectric related properties of internal tissues or organs based on said change; a reporting unit adapted to generate a report of said dielectric related properties; a housing adapted to contain said one or more EM transducers (401, 452), said reporting unit, and said processing unit, said housing is configured for being disposed on the body of the ambulatory user; characterised in that the processing unit is further adapted to extract one or more functionality features indicative to the posture from said intercepted one or more stable frequency CW signals and to classify the posture of the monitored user by matching said one or more extracted functionality features with reference features from a posture bank associated to selected postures, wherein said classified posture is used by the measuring dielectric properties unit for reducing the effect of the posture on the calculations of said dielectric related properties of internal tissues or organs. deliver one or more stable frequency continuous wave radio signals to the internal tissue in the thorax and intercept said one or more stable frequency CW radio signals from said internal tissue in a plurality of transmission sessions during a period of at least 24 hours; a processing unit adapted to: analyze one or more of the intercepted one or more stable CW radio signals of said one or more EM transducers for sensing a change over time of at least one of a phase and an amplitude of said intercepted one or more stable frequency CW radio signals, and a measuring dielectric properties unit adapted to calculate dielectric related properties of internal tissues or organs based on said change; analyze one or more of the intercepted one or more stable CW radio signals of said one or more EM transducers for sensing a change over time of at least one of a phase and an amplitude of said intercepted one or more stable frequency CW radio signals, and a measuring dielectric properties unit adapted to calculate dielectric related properties of internal tissues or organs based on said change; a reporting unit adapted to generate a report of said dielectric related properties; a housing adapted to contain said one or more EM transducers (401, 452), said reporting unit, and said processing unit, said housing is configured for being disposed on the body of the ambulatory user; characterised in that the processing unit is further adapted to extract one or more functionality features indicative to the posture from said intercepted one or more stable frequency CW signals and to classify the posture of the monitored user by matching said one or more extracted functionality features with reference features from a posture bank associated to selected postures, wherein said classified posture is used by the measuring dielectric properties unit for reducing the effect of the posture on the calculations of said dielectric related properties of internal tissues or organs.