RECURSIVE FOOTWEAR-BASED BODY PRESENCE DETECTION

Active footwear can include a system to automatically detect a presence or absence of a foot. In an example, various threshold conditions can be used together with sensor data to determine whether a foot is present. In an example, the system can be configured to sample values of a foot presence sensor signal from a foot presence sensor, identify an ambulatory status of the article of footwear using the sampled values of the sensor signal, and conditionally update a sensor signal threshold in response to identifying the ambulatory status. The updated sensor signal threshold and subsequent sensor signal values can be used to determine foot ingress, egress, or presence.