In this research, the effectiveness of the most to least prompting instruction method in teaching dynamic stretching exercises to adults with intellectual disabilities has been evaluated. At the same time, the impact of this instruction on flexibility and balance which are among physical fitness components has also been determined. A single subject multiple baseline model across behaviors with probe conditions was used. Participants in the study were four women, 34-37 years old. The single opportunity method was used while collecting the data of the study, and all sessions were completed at the end of a period of 16 weeks. The results obtained from the study indicated that the most to least prompting method was influential in all the participants' learning about dynamic stretching exercises. At the same time, results of the evaluation of the pre-test and post-test measures revealed increases in flexibility and balance of the participants in various ratios. The results of the study indicate that the most to least prompting method was an influential method in teaching dynamic stretching exercises to adults with intellectual disabilities, making these exercises maintenance and generalizing them. The results of the interviews conducted with teachers and parents in the study showed that the views of teachers and parents towards the most to least prompting method were positive.