Introduction: Given the benefits of exercise, and low participation, p
romoting exercise in older Americans is a national goal. Methods: This
study used a survey to military beneficiaries using the theory of pla
nned behavior and measurements of physical activity. Results: The resp
onse rate was 81.6%. The percentage of respondents who get regular exe
rcise [61.2%] was not different from that in national samples. Those g
etting regular exercise were more likely to state that their doctor re
commends exercise (p < 0.01). The theory of planned behavior regressio
n model, using variables for attitude, social norm, and perceived beha
vioral control, is strongly associated with intent to exercise; the ad
dition of habit significantly adds to this model (R-2 = 0.468, p < 0.0
01). Discussion: The theory of planned behavior is a valid model for p
redicting both the intention to exercise and actual exercise in older
adults. This study emphasizes the role of clinicians and this model in
promoting exercise in older persons.