Aspects of changing power consumption of a sensor of a wearable electronic device worn by a user are discussed herein. For example, in one aspect, based on detecting that a state of the user, as tracked by the wearable electronic device, has transitioned into an asleep state, an embodiment may decrease power consumption of at least one sensor from the set of sensors. Additionally, based on detecting that the state of the user, as tracked by the wearable electronic device, has transitioned out of the asleep state, the embodiment may reverse the decrease of power consumption of the at least one sensor.