Disclosed are devices, systems, apparatus, methods, products, and other implementations, including a method that includes obtaining biometric data of a user, and generating instruction data, presentable on a user interface, based on data relating to one or more activities to be completed by the user and based on the biometric data of the user. In some embodiments, obtaining the biometric data may include measuring one or more of, for example, heart rate, blood pressure, blood oxygen level, temperature, speech-related attributes, breath, and/or eye behavior.
