The aim of this study was to investigate the effect of functional fatigue on the dynamic and static balance of male students aged 15 to 18 with different plantar arch. To measure the subjects' foot arch, the Navicular Drop Test was used. The subjects were then randomly divided into three groups of 22 members with different foot arches. Later on, SEBT test, Modified Stork Balance, Fatigue Protocol and Borg (RPE) scale were run. Using SPSS (version 18), the data were analyzed (p< .05); in particular, dependent t-tests, One-way ANOVA and Scheffe's post hoc test were run. The results showed a significant difference between pre-test and post-test scores of dynamic and static balance in all three groups. Scheffe's post hoc test revealed that there was a significant difference between the mean difference of pre-test and post-test scores of the dynamic and static balance group of normal foot arch, the flat foot arch group and the cavus foot arch group. Meanwhile, the difference between flat and cavus foot group was not statistically significant. Due to the significant reduction in the balance of subjects with abnormal arch, the correction of the abnormality of the foot arch as well as the use of appropriate training courses are recommended to improve their physical fitness.
