A new protocol is presented to validate TIPS (portable physiological monitoring device designed by I3BH that can get respiration, ecg and activity of the patient) for physical habits detection. Physiological and activity parameters and data from questionnaires have been acquired from a group of obese & non-obese children (n=20). Children completed activities from sedentary level to vigorous level. Preliminary results show variability on the response of children's effort and feasibility of TIPS platform as an ambulatory tool.