This study aimed to examine the effects of a mental training package on the performance of a 1600-m run. Participants were 3 male triathletes and 1 male elite runner. A single-subject multiple baseline across individuals design was employed to evaluate the treatment package. Results demonstrated that the mental training package was effective in improving the running performance of the three participants who received intervention. Social validation results were favorable and indicated that participants enjoyed using the mental training package and were pleased with the results. Further, coaches felt that the results were important, especially those for the elite track athlete.