I don&#x27;t know how much nature&#x2F;nurture is involved. I assume some percentage of each in most cases. And, I&#x27;m not blaming victims nor suggesting people pull themselves up by their bootstraps in the face of massive adversity (which is what people often appear to assume when &quot;responsibility&quot; is mentioned).<p>Very simply, I don&#x27;t think being overworked is the leading cause of the negative correlation between poverty and exercise (if one even exists). Instead, a confounding variable (a behavior or attitude) common to both poverty and lack of exercise exists and results in a manifestation of both (in most, but certainly not all cases).