sciencedaily.com
sciencedaily.com
cnn.com
usnews.com
medicalxpress.com
Medical Xpress
https://medicalxpress.com › tags › physical+activity
theconversation.com
phys.org
news.google.com
hsph.harvard.edu
Harvard T.H. Chan School of Public Health
https://hsph.harvard.edu › news › exercising-more-than-recommended-could-lengthen-life-study-suggests
journals.sagepub.com
cdc.gov
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