Paradigm of vascular aging: conceptual strides slowed by technical limitations Author: Forman DE Conference/Journal: Journal of the American Geriatrics Society Date published: 2002 Other: Volume ID: 50 , Issue ID: 6 , Pages: 1159 , Word Count: 49 Paradigm of vascular aging: conceptual strides slowed by technical limitations. Daniel E. Forman. Journal of the American Geriatrics Society. June 2002 v50 i6 p1159(2). Abstract: This editorial comments on the effects of hyperhomocysteinemia and Tai Chi Chuan exercise training on endothelial performance with repect to vascular aging in older individuals.