High training volumes and injury risk with junior tennis players has gained much attention. In recent years, the ideas of monitoring training volume to provide guidance to coaches has been an area of interest to support the potential reduction in injury rates. In tennis several internal and external methods have been used to determine training loads. Often these methods vary in cost, ease, accuracy and reliability. As such this review provides information on training monitoring for junior tennis players using methods including heart rate (HR), heart rate variability (HRV), wellness questionnaires, rating of perceived exertion (RPE), global positioning systems (GPS), physical testing and wearable technologies
