Completed questionaires of ninety-five skiers (63% response), 55 men and 40 women, age 1836 (mean 24.7) were collected. Twenty-one men (38%) and 24 women (60%) (p=0.035) reported a total of 74 former major knee injuries, ranging from 1 to 5, during their skiing careers. Thirteen men (23.6%) and 12 women (30.0%) (p=0.49) reported a total of 34 former ACL injuries. Three men and 3 women had sustained bilateral ACL ruptures, whereas 3 skiers had had reruptures in one knee. Four of the 34 torn ACLs were not reconstructed. Nineteen of the 34 ACL injuries were combined with cartilage, meniscal or MCL injuries. Five skiers (5.3%) reported to have had a cartilage injury without an ACL injury, 7 skiers (7.4%) reported meniscal tears without ACL or cartilage injuries and 12 skiers (12.6%) reported isolated MCL injuries.
There were not any significant difference between the genders in the prevalence of any of the specific types of injury. Furthermore, the prevalence of knee injuries as a total, as well as of each specific type of injury, was not significant different for the two disciplines moguls and aerials. The mean number of years World Cup skiing in the group of injured skiers (5.73 years) was significant higher than in the group of non-injured skiers (3.23 y) (p<0.001).
Nearly half of the responding FIS freestyle World Championship skiers had previously sustained one or more major knee injuries and still returned to such a high level of athletic performance. One fourth of the skiers had sustained one or more former ACL ruptures. The prevalence of previous serious knee injuries over all was significantly higher among female than among male skiers, although the prevalence of any specific type of knee injury, such as former ACL injuries, did not show significant difference between genders.