RT Journal
A1 Buchman AS, Yu L, Boyle PA, Shah RC, Bennett DA
T1 TOtal daily physical activity and longevity in old age
JF Archives of Internal Medicine
JO Archives of Internal Medicine
YR 2012
FD March 12
VO 172
IS 5
SP 444
OP 446
DO 10.1001/archinternmed.2011.1477
UL http://dx.doi.org/10.1001/archinternmed.2011.1477
AB 
Increased levels of exercise are currently recommended to improve health and increase longevity, but gaps in our knowledge impede the formulation of evidence-based recommendations, particularly in older individuals.1 Most studies of physical activity in old age have focused on self-reported physical activity measures, which are affected by recall bias. Moreover, few studies have examined the contribution of nonexercise physical activity to survival in old age.2- 4 We tested the hypothesis that an objective measure of total daily activity, including both exercise and nonexercise physical activity, is associated with longevity in community-dwelling older persons.