For older Americans, reversal of the brain shrinkage that occurs
as people age is just one benefit of greater physical activity,
according to research published in the latest issue of The
Journal of Gerontology: Medical Sciences (Vol. 61A, No. 11). In
a special section devoted to exercising and aging, this edition
of the journal features five separate reports on the topic.
Until recently, scientists believed older brains could not grow
new neurons. However, a team at the University of Illinois has
evidence showing that three hours of brisk walking per day can
trigger biochemical changes that increase production of new
brain neurons. Another article shows that a structured exercise
program may boost the physical well-being of sedentary seniors
who are at risk of losing independent functioning. This
particular conclusion was drawn from the recent Lifestyle
Interventions and Independence for Elders (LIFE) pilot study.
Members of the public can purchase this issue of the journal
online at www.geron.org for $25. T