There are many types of sensors used in sports, including: Heart rate monitors to track pulse and breathing patterns. Inertial sensors that perform human motion analysis and can be used for recovery after injuries and accidents. Accelerometers and gyroscopes to monitor position, rotation, acceleration and speed.

Any soccer fan can tell you, the referees on the field are far from perfect. While the human element of refereeing is a necessary and exciting part of sports, as fans, we want to see the best team (or athlete) win. VAR helps ensure that referees make the correct calls every time, so the game is fair and equitable.