How is a sedentary lifestyle defined as a risk factor?

A sedentary lifestyle is defined as engaging in insufficient physical activity, which directly correlates to various health risks and negative outcomes. Specifically, the definition that aligns with established guidelines indicates that a person is considered sedentary if they do not meet the threshold of at least 150 minutes of moderate-intensity exercise per week, which translates roughly to 30 minutes of activity at least three days per week.

This definition is crucial as it highlights the minimum level of physical activity needed to maintain health and reduce the risk of chronic diseases, such as obesity, heart disease, and diabetes. When individuals do not meet this level of activity, their risk for various negative health implications increases, thus categorizing a sedentary lifestyle as a significant risk factor.

The other choices do not adequately capture the definition of a sedentary lifestyle, as they either suggest a level of activity that may not be sufficient to promote health or include forms of activity (like chores or sporadic sports engagement) that may not reflect the structured and consistent level of physical exercise necessary for health benefits. Therefore, option A clearly aligns with the recognized minimum standards for physical activity to avoid being classified as leading a sedentary lifestyle.