What is one key indicator of a sedentary lifestyle?

A key indicator of a sedentary lifestyle is engaging in less than 150 minutes of moderate-intensity aerobic activity per week. The 150-minute guideline is based on recommendations from health organizations that aim to promote cardiovascular health, enhance physical fitness, and improve overall well-being. Failing to meet this threshold suggests that a person is likely not getting enough physical activity, which can lead to various health issues, including obesity, cardiovascular disease, and decreased muscle strength.

In contrast, engaging in over 150 minutes of vigorous exercise weekly indicates a highly active lifestyle rather than a sedentary one. Participating in sports only on weekends could imply that during the weekdays, an individual may engage in little to no physical activity, but it doesn't necessarily define a sedentary lifestyle as the primary determinant is overall weekly activity levels. Spending more than 5 hours a day exercising signifies an extremely active lifestyle, far from being sedentary. Thus, option B aligns directly with the characteristics of a sedentary lifestyle.