A method of monitoring a user's activity level, and improving the user's health with a wearable device designed to be worn all day. The method comprises in one embodiment determining that the user is wearing the wearable device, and monitoring movements of the user using a motion sensing system in the wearable device. The method further determines when the user has not moved in a period of time, and alerts the user to move, when the user has not moved from an ergonomic activity in a preset period of time. The method further counts steps taken by a user, and identifies and tracks aerobic exercise activity.