Iliopsoas muscle injury in athletes ―Comparative study between muscle-strain type and peritendinitis type―

Abstract

The subjects were 83 athletes who were diagnosed with iliopsoas muscle injury during the period from March 2015 to March 2020. We classified iliopsoas muscle injury into muscle-strain type (MT) and peritendinitis type (PT) based on the MRI signal intensity. Then we investigated the number of patients by type, age, gender ratio, sports event, presence of causal injury and causal movement, duration of disease, presence of complicated injury, and time to return to sports (RTS) based on the medical records retrospectively and compared the two types.

The number of MT was 45, and that of PT was 38. The ratio of men to women was significantly more for MT than PT (p<0.01). Many patients who played soccer had MT, while many participating in track and field had PT. There was a significantly higher presence of a causal injury than its absence with MT (p<0.01), and many cases were caused by running and kicking. The was a significantly higher absence of a causal injury than its presence with PT (p<0.01). The duration of disease and the time to RTS was significantly shorter with MT than PT (p<0.01, p<0.01). There were no significant differences in the age and the presence of complicated injuries.