The overall purpose of this study was to examine the effect of deterministic media reports, linking genetics to inactivity, in relation to inactive people's social cognitions concerning physical activity involvement. Sixty three inactive university students were randomly allocated to one of three experimental conditions (control, genetically-primed, experientially-primed) and completed measures of instrumental and affective attitudes, subjective norms, self-efficacy, and exercise intentions. One week later participants in the two experimental conditions were provided with a bogus newspaper report that either reflected a genetic explanation for physical inactivity or an experiential basis for inactivity. Shortly afterwards, participants in all three conditions completed the same measures as at pre-test. The results revealed that after controlling for baseline measures participants in the experientially-primed condition reported significantly higher levels of self-efficacy and intentions to exercise than those in the genetically-primed condition. These findings raise a cautionary flag concerning the presentation of genetic research in the media, especially with regard to inactive populations.