National Academy of Sports Medicine (NASM) Group Fitness Instructor Practice Exam 2025 – All-in-One Guide to Achieve Certification Success!

The concept of affective influence involves emotions and feelings significantly impacting an individual's behavior. When a person expresses feelings of depression, those emotional states can lead to a lack of motivation to engage in physical activity, illustrating how affective factors can drive behavior. In this situation, your friend's emotional well-being is the primary factor influencing his choice to not exercise.

Additionally, it's important to note that while cognitive influences involve thoughts and beliefs that may also impact behavior, the specific expression of depression points more directly to emotional factors. Environmental influences would relate to external circumstances that could affect someone's behavior, such as social support or physical surroundings. Behavioral influences refer to past actions that might shape current behavior, but in this case, the pressing emotional state of depression is the most definitive driving force behind the lack of exercise.