Embodiments of the relate generally to electrical and electronic hardware, computer software, wired and wireless network communications, and wearable computing devices for facilitating health and wellness-related information. More specifically, disclosed are systems, methods, devices, computer readable medium, and apparatuses configured to determine activity and activity types, including gestures, from sensed motion signals using, for example, a wearable device (or carried device) and one or more motion sensors. In some embodiments, a method can include receiving data representing a motion sensor signal from a motion sensor disposed in a wearable device, and generating intermediate motion signals from the motion sensor signal. The method can also include separating the motion sensor signal at a processor to form one or more constituent components, and identifying an activity based on at least one of the intermediate motion signals and at least one of the one or more constituent components.
