22/09/2026
Who gets FAIS and when?
FAIS symptoms often first appear in early adolescence, but they tend to become most pronounced in the late teens and early twenties, with peak incidence generally falling somewhere between 20 and 40 years of age.
Activities that demand an extreme range of hip motion, such as ballet, gymnastics or martial arts can bring symptoms on earlier or make them more noticeable, simply because these movements push the joint toward the end ranges where impingement is most likely to occur.
Symptoms are also more common in the athletic population generally, particularly in sports that involve rapid changes of direction, such as basketball, AFL and soccer.
Movements in these sports typically repeatedly load the hip through rotation and deep flexion.
From a clinical perspective, the timing for diagnosing FAIS matters.
Because FAIS tends to take hold during the very years someone is most active in sport, and because it can persist and contribute to hip osteoarthritis later in life, recognising the early signs in adolescence and early adulthood is where the real opportunity for management lies.