DISCUSSION
This study aimed to assess changes in cognitive perfor- mance in depressed elderly persons during and after a session of physical exercise. To the best of our knowledge, this is the first study to examine this issue using a dual-task paradigm (motor and cognitive stimuli). We found an improvement in attention and inhibitory control but not in working memory after a 30-minute moderately intense walk on a treadmill. These results only partially confirmed our hypothesis because we found changes only after but not during the exercise.