Abstract
Recently, trail running on various surface conditions, i.e. uphill, downhill, wet, rock and so on, is getting popular year by year. In these surface conditions, it is predicted that load applied to the lower-extremity becomes higher during running on camber, which demonstrates the condition to run across sloped surface laterally. However, there are few studies that have discussed relationship between footwear stability and kinematics of lower-extremity in camber running. The purpose of this kinematics in camber running, motion analyses on three surface conditions (flat, CM: Medial side of the foot gets higher than lateral and CL: Lateral side of the foot gets higher than medial) were carried out. As a result, rearfoot eversion angle (β) in CL running and knee varus angle (ζ) in CM running become higher than those in flat running at foot flat phase. It was also confirmed that knee varus angle has a high correlation with rearfoot inversion angle in CM running. Furthermore, the influence of sole structures on β and ζ was also discussed.
