What are hip flexor injuries?

According to Physio Advisor, a hip flexor injury is an injury characterized by tearing of one or more of the hip flexor muscles, typically causing pain in the front of the hip or groin. It's also known as an Iliopsoas strain/injury or Psoas strain/injury.

As the Richard Stockton College Athletic Training website explains, a hip flexor injury is the result of an overly forceful contraction, which can occur during a sprint or a series of sprints. Hip flexor injuries range from grade 1 to grade 3, with grade 1 consisting of a small number of fibers torn but still allowing for full function, and grade 3 consisting of all muscle fibers being torn and resulting in major loss of function.