MedicalResearch.com Interview with: [caption id="attachment_72117" align="alignleft" width="150"] Yang Hu[/caption] Yang Hu, Research scientist Department of Nutrition Harvard T.H. Chan School of Public Health MedicalResearch.com: What is the background for this study? Response: Previous studies have established that increasing total activity level is beneficial to prevent premature death but data on the health benefits of individual type of activity is still limited. Whether engaging in more types of activities at the same level total activity would offer additional health benefits towards longevity remains unknown.