Abstract: A fall detection device having a wearable housing, a processor, a sensor system operatively connected to the processor and configured to detect a physiological condition of the wearer's body, a motion sensor, a wireless communication module processor, and a memory. The memory stores computer readable instructions that cause the processor to: monitor the motion sensor to detect a decrease in acceleration in the gravitational direction below a first threshold; start a timer upon detecting the decrease in acceleration; monitor the motion sensor to detect a fall-indicative acceleration above a second level prior to the timer reaching a first predetermined time; monitor the motion sensor to detect a recovery-indicative acceleration above a third level prior to the timer reaching a second predetermined time; and activate the wireless communication module to initiate an emergency alert if the fall-indicative acceleration is detected and the recovery-indicative acceleration is not detected.