In an exercise setting where impression motivation might be high but self-presentation efficacy low, social anxiety is likely to occur (Schlenker & Leary, 1982). Narcissism is, however, associated with low anxiety, high confidence, and a keenness for social evaluation (Wallace, Baumeister, & Vohs, 2005) and therefore may protect exercisers from social anxiety. One hundred and sixty undergraduates (88 males and 72 females; /M(age) = 20.45 years, SD = 2.49 years) completed measures of narcissism, social anxiety, and self-presentation in exercise. In females, narcissism moderated the impression motivation/construction-social anxiety relationships. Findings extend our understanding of the self-presentational processes involved in exercise and, specifically, how narcissism protects individuals from experiencing high social anxiety. (C) 2010 Elsevier Ltd. All rights reserved.