A sustained preoccupation with the planning and execution of behaviors to reach a health and wellness goal is referred to as?

The term describing a sustained preoccupation with the planning and execution of behaviors to reach a health and wellness goal is best captured by the concept of a healthy obsession. This reflects an intense, positive focus on accomplishing specific health objectives, suggesting that the individual is dedicated and possibly even passionate about their journey towards better health and wellness.

This notion is significant as it highlights the balance between being deeply invested in one's goals while still engaging in behaviors that promote well-being. A healthy obsession allows for commitment without veering into detrimental patterns, differentiating it from potentially harmful fixations or obsessive behaviors that could lead to negative health outcomes.

Other terms in the provided choices—like response compulsion, response cost, and reinforced behavior—do not effectively convey this focused, yet constructive drive typical of a healthy obsession. Each of these terms refers to different behavioral or psychological concepts that do not align with the idea of a positive engagement in health and wellness planning and execution. Thus, the most fitting descriptor for the preoccupation with health goals is indeed a healthy obsession.