| http://www.w3.org/ns/prov#value | - for 20 minutes was a challenge. ???I was really out of shape,??? he remembers.Now, less than three years later, Richard arrives early for his twice-weekly sessions on a walking track so he can get in a full hour. ???It???s definitely helped me,??? says Richard, who at 83 reports that he???s healthy and takes long neighborhood walks on days he doesn???t report to the LIFE study.If the intervention
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