The primary purpose of this study is to determine whether or not there is a correlation between MRI and ultrasound for the diagnosis of lower limb stress injuries. Patients that are seen at the University of Iowa Sports Medicine Center with a suspected diagnosis of a lower limb stress injury will be recruited. These patients will undergo a diagnostic ultrasound of the affected region prior to undergoing an MRI of that region. Then, the ultrasound findings will be compared to the MRI findings to determine if a correlation exists.

Inclusion criteria:

• Age 18-50
• MRI confirmed tibial or metatarsal stress injury

Exclusion criteria:

-Prior history of stress fracture or fracture in the affected limb at the region of concern.

25 patients ages 18-50 with a suspected diagnosis of a lower limb stress injury (specifically of the tibia or metatarsal) will be recruited. Patients will excluded if they have a prior history of stress fracture or fracture in the affected limb at the region on concern.