?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Elhakeem%2C+A&rft.aulast=Elhakeem&rft.aufirst=A&rft.pages=727-737&rft.issue=4&rft.atitle=Correlates+of+high+impact+physical+activity+measured+objectively+in+older+British+adults&rft.title=Journal+of+Public+Health&rft.volume=40&rft.date=December+2018&rft.genre=article