The purpose of the study was to investigate the effect of 12-weeks training of Surya Namaskar (SN) with two variations (SN mantra chanting and following fixed breathing pattern) from the ordinary SN on performance of six letter cancellation test (SLCT) in school children. For this purpose 36 male school children (12 in each group), of 13-15 years of age groups with a mean and SD of 13.72±0.88 were selected from Ram Krishna Vidya Mandir, Gwalior, Madhya Pradesh as the subjects for this study. In order to investigative the existence of significant difference among different group’s performance on SLCT the analysis of co- variance (ANCOVA) was used and level of significant was set at 0.05. The result showed that there was significance difference in performance on SLCT between mantras and control group and mantras and breathing group. There was no significant difference between breathing and control group.