%0 Journal Article %T Interactive communication strategies: implications for population-based physical-activity promotion. %A Marcus, B H %A Nigg, C R %A Riebe, D %A Forsyth, L H %J American Journal of Preventive Medicine %V 19 %N 2 %P 121-6 %@ 0749-3797 %D 2000-10-05 %~ DeepDyve