the prediction of physical activity intention and behavior in elderly male residents of a nursing home: a comparison of two behavioral theories

background: regular physical activity is ranked as a leading health indicator. despite the extensive benefits of physical activity, elder people are much less active than desired. using theory of planned behavior (tpb) and the self-efficacy construct, this study examined the prediction of physical activity intention and behavior in a sample of elderly male resident of a nursing home. methods: in a cross-sectional study of the residents of kahrizak nursing home in tehran, iran, elderly men who were 60 years or older, capable of independent living, mobility, and verbal communication were asked to complete measures of the tpb, self-efficacy and physical activity behavior. results: a hierarchical step-wise multiple regression analysis indicated that affective/instrumental attitude, subjective norm, and perceived behavioral control (pbc) explained 32.8% of the variance in physical activity intention, and self-efficacy provided an additional 2.7%. in a reverse step regression, the tpb variables explained an additional 12.2% of physical activity intention. in a multiple regression analysis on physical activity behavior, affective/instrumental attitude, subjective norm, perceived behavioral control (pbc) and intention explained 15.7% of the variance in physical activity behavior while self-efficacy contributed an additional 5.6%. in the reverse step regression, tpb predictors contributed an additional 3.0% in explaining the variance in physical activity behavior. conclusion: the results indicate that in addition to the tpb, self-efficacy may also play an important role in the prediction of behavior, and should be included in the design of physical activity programs for elderly men of nursing home residents.