What does the Action Stage signify in the Transtheoretical Model?

The Action Stage in the Transtheoretical Model signifies that the individual is actively engaged in behavior change. In this stage, individuals have made specific modifications to their behavior and are implementing strategies to maintain those changes. They are no longer just considering the change or planning for it; they are taking concrete steps toward changing their behavior. This stage is characterized by overt efforts and active engagement in the process of change, which can involve seeking support, using tools or resources related to the change, and actively avoiding situations that could lead to relapse.

In contrast, contemplation refers to the individual thinking about change but not yet committed to taking action, uncertainty indicates a lack of decisiveness regarding the change, and relapse involves reverting to old behaviors after having made some progress.