The mean values indicated that children with mild ID scored lower on initial fitness assessment when compared to
children with borderline ID. On final assessment, the results were improved in all three groups; however, adjusted mean
values (Myp) indicated best improvement of balance, bent arm hanging test and cardio respiratory endurance in children
with borderline ID from group E. Children with mild ID from the same group showed better strength improvement by long jump and abdominal muscle endurance. Children with ID from the control group (K1) who did not participate in exercise,
demonstrated improvement on final assessment, which was probably due to learning and acquaintance with testing
situation; their improvement, however, remained poorer when compared with children who were involved in the exercise
program.