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Journal Article The Effects of Physical Conditioning on Older Individuals. I. Work Capacity, Circulatory-Respiratory Function, and Work Electrocardiogram Get access Alan J. Barry, Ph.D., Alan J. Barry, Ph.D. Search for other works by this author on: Oxford Academic PubMed Google Scholar James W. Daly, M.D., James W. Daly, M.D. Search for other works by this author on: Oxford Academic PubMed Google Scholar Esther D. R. Pruett, M.A., Esther D. R. Pruett, M.A. Search for other works by this author on: Oxford Academic PubMed Google Scholar John R. Steinmetz, M.Ed., John R. Steinmetz, M.Ed. Search for other works by this author on: Oxford Academic PubMed Google Scholar Henry F. Page, M.D., Henry F. Page, M.D. Search for other works by this author on: Oxford Academic PubMed Google Scholar Newton C. Birkhead, M.D., Ph.D, Newton C. Birkhead, M.D., Ph.D Search for other works by this author on: Oxford Academic PubMed Google Scholar Kaare Rodahl, M.D. Kaare Rodahl, M.D. Search for other works by this author on: Oxford Academic PubMed Google Scholar Journal of Gerontology, Volume 21, Issue 2, April 1966, Pages 182–191, https://doi.org/10.1093/geronj/21.2.182 Published: 01 April 1966
Barry et al. (Fri,) studied this question.