Mobile and digital healthcare sensing has evolved dramatically over the last decade. We are now experiencing a new change in physiological sensing paradigm where data collection is made ambiently without explicit user effort. This talk will introduce two examples of such systems, where accurate physiological signals captured in a non-intrusive manner. Specifically, this talk will discuss HeartQuake and VitaMon, which are embedded and mobile sensing systems that capture physiological signals (e.g., ECG and HRV) of users in a non-intrusive and contactless way. Both of these sensing systems shed light to new opportunities in capturing human physiological data via a truly ubiquitous approach and can catalyze the development of ambient healthcare systems.