Used definitions in data collection23
| Injury | Any physical complaint sustained by a player that results from a soccer match or soccer practice session, irrespective of the need for medical attention or time loss from soccer activities |
| Recurrent injury | An injury of the same type and at the same site as a previous injury and which occurs after a player's return to full participation from the index injury |
| Match exposure | Play between teams from different clubs |
| Training exposure | Team based and individual physical activities under the control or guidance of the team's coaching or fitness staff that are aimed at maintaining or improving players’ football skills or physical condition |