For future etiologic cohort studies in runners it is important to identify whether ( hyper ) pronation of the foot , decreased ankle joint dorsiflexion ( AJD ) and the degree of the extension of the first Metatarsophalangeal joint ( MTP1 ) are risk factors for running injuries and to determine possible sex differences.These parameters are frequently determined with the navicular drop test ( NDT ) Stance and Single Limb-Stance , the Ankle Joint Dorsiflexion-test , and the extension MTP1-test in a healthy population .