The current study investigated the impact of a training program on a peer-to-peer intervention designed to increase the use of bicycle helmets on a large college campus. The training program was evaluated by the number of interactions a peer change agent--an individual who attempts to make a positive change in another person's behavior, had with bicyclists. The results suggest the training program may be effective in increasing change agent interactions for change agents who are already commitment to the intervention leading to more interactions per capita between committed trained change agents and bicyclists than untrained change agent and bicyclists. However, these results must be interpreted with caution due to small and unequal sample sizes.