Training sessionTeam training that involved physical activity under the supervision of the coaching staff.
MatchCompetitive or friendly match against another team.
InjuryInjury resulting from playing football and leading to a player being unable to fully participate in future training or match play (ie, time-loss injury).
RehabilitationA player was considered injured until team medical staff allowed full participation in training and availability for match selection.
Re-injuryInjury of the same type and at the same site as an index injury occurring no more than 2 months after a player's return to full participation from the index injury.
Minimal injuryInjury causing absence of 1–3 days from training and match play.
Mild injuryInjury causing absence of 4–7 days from training and match play.
Moderate injuryInjury causing absence of 8.28 days from training and match play.
Severe injuryInjury causing absence of over 28 days from training and match play.
Traumatic injuryInjury with sudden onset and known cause.
Overuse injuryInjury with insidious onset and no known trauma.
Foul play injuryMatch injury resulting from foul play according to the decision of the referee.
Injury incidenceNumber of injuries per 1000 player hours ((Σ injuries/Σ exposure hours)×1000)