Final answer:
A person who has been exercising consistently for 6 months or longer is in the Maintenance stage of change.
Step-by-step explanation:
A person who has been exercising consistently for 6 months or longer is in the Maintenance stage of change. In this stage, individuals have established a routine and are actively working to maintain their healthy behavior.
The Maintenance stage is the fifth stage of the Transtheoretical Model of Behavior Change, which describes the different stages people go through when making and sustaining behavior changes. It is characterized by ongoing commitment and effort to prevent relapse and continue the desired behavior.
For example, someone who has been consistently going to the gym for 6 months or longer and has developed a habit of regular exercise would be in the Maintenance stage.