Objective: The purpose of this study was to compare the two models of marker placement for identifying of rear foot angle in normal people with and without shoes during the different stage of stance phase of walking.

Methods: Fifteen male students in Birjand University were selected based on Navicular Drop Index. After marker placement based on Clarke and Nigg models, the rear foot angle were recorded with two-dimensional analysis (Panasonic Camera) from behind position while subjects walked with 1.7 m/s on a treadmill with and without shoes. For statistical analysis, independent samples t-test was used (p≤0.05).

Results: The Results showed a significant difference in rear foot angle during the stance phase between the two models of Clarke and Nigg during walking with and without shoes (p≤0.001).

Conclusion: Based on the results of the present study, due to their specific features care must be considered when using any of these two models to investigate the angular kinematics of the foot.