Expanding reality using a head-mounted display may consist in the following: Learning to solve a problem by walking across a virtual environment while seeing one’s virtual body from behind. This illustrates that extended reality technology can change the perception of one's body relative to the environment while learning a behavior. This change of body-environment perception has the potential to enhance both human well-being and learning. My current research and teaching activities therefore focus on the following question: how can we change body-environment perception using extended reality technologies (VR, MR, AI) such that human well-being and learning are enhanced?