Following the selection and alignment of the sample population, initial assessment of physical fitness was performed.
Final assessment was done after the completion of the 6-month experimental program. Physical fitness was assessed in a
sports facility that meet all the required criteria (health and sanitary requirements, adequately dimensioned space, lighting,
adequate flooring, sufficient equipment and accessories, measuring instruments). After careful consideration of the initial
results and assessment of all parameters related to the abilities of children with ID, individual programs were designed for all
children from the experimental group. The 6-month fitness program consisted of 3 weekly sessions, each lasting 45 min,
with activities performed with each child individually. The fitness sessions took place both during and outside school hours.
The fitness program included a detailed description of exercises, exercise aim (e.g. developing coordination), time and venue
(e.g. gym, Monday 14–14.45), person responsible for leading the program (e.g. name of the leader). Most of the activities
were performed in the indoor sports facility and outdoor grounds, with participation of senior year students of the Teachers’
Training Faculty, class teachers, as well as sports teachers. The activities performed were exercises recommended for
development of specific physical fitness.