Final answer:
The authors of the paper argue that failure to meet public health recommendations for moderate-to-vigorous physical activity is the most correct definition of sedentary behavior. The 2018 Physical Activity Guidelines for Americans recommend at least 150 minutes to 300 minutes per week of moderate-intensity aerobic activity for substantial health benefits. Individuals who fail to meet these recommendations can be considered to have sedentary behavior.
Step-by-step explanation:
The authors of the paper argue that failure to meet public health recommendations for moderate-to-vigorous physical activity is the most correct definition of sedentary behavior among the proposed options.
The 2018 Physical Activity Guidelines for Americans, issued by the Department of Health and Human Services, recommend that adults engage in at least 150 minutes (2 hours and 30 minutes) to 300 minutes (5 hours) per week of moderate-intensity aerobic activity or an equivalent combination of moderate- and vigorous-intensity activity for substantial health benefits.
Therefore, the authors argue that individuals who fail to meet these recommendations and engage in inadequate levels of physical activity can be considered to have sedentary behavior.