The effect of a multifaceted efficacy intervention on exercise behavior in relatives of colon cancer patients.

Background: Regular physical activity (PA) provides health benefits; however, at least 60% of the population fails to engage in the recommended amount of PA required to produce these health benefits.

Purpose: The primary purpose of the study was to examine over a 12-week structured exercise program the effect of a multifaceted efficacy intervention (MEI-i.e.