The thought is that overuse paired with a strength imbalance of one’s overdeveloped hip adductors (groin muscle) and weak lower abdominal musculature (core) is the root cause.
Arian Foster's Groin Injury… What Happened?
Arian Foster underwent surgery that could have him out for half the 2015/16 NFL season. The details of the exact injury are a bit foggy. So I’ll give my best interpretation of one possibility of the issue at hand.