 Attention deficit hyperactivity disorder, ADHD, is a neurobehavioral condition characterized by inattentiveness, hyperactivity, and impulsivity. Physical activity has been found to be beneficial for cognitive functioning, particularly in adolescence with ADHD. This study investigated the effects of a swimming exercise program on the symptoms of ADHD in an adult diagnosed with the condition since childhood. The results showed that the swimming learning program significantly reduced the symptoms of inattention and hyperactivity, as measured by the psychometric indices used in the study. Additional research is necessary to further explore the relationship between physical activities and improve mental performance in adults with ADHD. This article was authored by Smiragda Scaladu, Andreas Anestis, Nicoleta Bacolas, and others.