This study examined the patterns of imagery use and motivational self-determination, and the relationships between them in regular exercisers (RE), non-exercisers who intend to exercise (NE-I), and non-exercisers who do not intend to exercise (NE-N). A survey was conducted through the random sampling of a large population. The NE-N group reported using the same amount of imagery as the other 2 groups. NE-N participants were the least and RE participants the most self-determined, with NE-I participants in between. The patterns of association among imagery and self-determination were different for the NE-N participants than the other 2 groups. It was concluded that imagery interventions that might be successful with RE and NE-I participants are unlikely to be effective with NE-N participants.