What defines a sedentary lifestyle in terms of exercise frequency and duration?

A sedentary lifestyle is commonly characterized by a lack of adequate physical activity, which is typically defined by standards set by health organizations. The correct choice emphasizes the absence of sufficient moderate-intensity exercise, specifically the recommendation of engaging in at least 30 minutes of moderate-intensity exercise on three or more days of the week.

This benchmark reflects the minimum level of physical activity required to promote health benefits and reduce risks associated with inactivity. Regular moderate-intensity exercise is crucial for maintaining overall health, enhancing cardiovascular fitness, and preventing chronic diseases. By recognizing that not meeting these guidelines characterizes a sedentary lifestyle, this answer captures the essence of insufficient physical activity.

In contrast to this, the other options either suggest a minimal level of exercise that does not reach established thresholds, describe low-intensity exercise as adequate, or mention a lack of a structured program without defining inactivity clearly. Thus, they do not accurately encapsulate what constitutes a sedentary lifestyle according to recognized exercise guidelines.