In this study by Marcus et al, 249 sedentary adults were randomized to 1 of the following 3 physical activity interventions: (1) Internet intervention motivationally tailored to the individual (tailored Internet); (2) print intervention motivationally tailored to the individual (tailored print; shown to be effective previously); and (3) 6 researcher-selected Web sites currently available to the public (standard Internet). At 6 months, the tailored Internet arm reported a median of 120.0 minutes of physical activity per week; the tailored print arm, 112.5 minutes per week; and the standard Internet arm, 90.0 minutes per week (P = .15). At 12 months, the median physical activity minutes per week were 90.0, 90.0, and 80.0 for the tailored Internet, tailored print, and standard Internet arms, respectively (P = .74). The results indicated no significant differences between the 3 arms. Because the use of the Internet was not different from the print-based intervention, this provides evidence that different channels of delivery can provide equally effective results.