Predicting physical activity among low-income Mexican American women: application of the theory of planned behavior.

Objectives: To utilize the theory of planned behavior (TPB) in explaining the prediction of physical activity intention and determine if present activity behavior attenuates theory construct relationships in a sample of low-income Mexican women.

Methods: Data were gathered on 201 subjects through a self-report survey instrument and analyzed through structural equation modeling.

Results: Present activity behavior attenuated theory construct influence on intention, and perceived behavioral control was the strongest predictor of intent to engage in physical activity.