1. A coach decision support method comprising: collecting sensor data associated with an athlete at a data logger circuitry, wherein the sensor data is generated by at least one sensor placed on the athlete; pre-processing the sensor data at the data logger circuitry by filtering sensor noise from the sensor data; extracting at least one feature set from the collected sensor data; classifying with the circuitry the at least one extracted feature set into at least one physical activity; transmitting the physical activity classification to a data analysis circuitry; generating with the data analysis circuitry a report of the physical activity indicative of a performance of the athlete within a sporting arena; and generating with the data analysis circuitry at least one coach decision recommendation based at least in part on the report.