The effects of aerobic- versus strength-training on body image among young women with pre-existing body image concerns.

This experiment compared the effects of aerobic-training (AT) versus strength-training (ST) on body image among young women with pre-existing body image concerns. Theory-based correlates of body image change were also examined. Participants were 46 women (M age=21.5 years), randomly assigned to an 8-week AT or ST intervention consisting of supervised exercise 3 days/week. Multidimensional measures of body image were administered pre- and post-intervention, along with measures of physical fitness, perceived fitness, and exercise self-efficacy. Women in the AT condition reported greater reductions in social physique anxiety (p=.001) and tended to report greater improvements in appearance evaluation (p=.06) than women in the ST condition. Changes in perceived fatness, perceived aerobic endurance and aerobic self-efficacy were significantly correlated with body image change (ps<.003). Results provide direction for prescribing exercise to improve body image and advancing theory to account for the effects of exercise.

The effects of threatened social evaluation of the physique on cortisol activity.

Social self preservation theory asserts that situations high in social-evaluative threat elicit increases in cortisol, a hormone released by the hypothalamic-pituitary-adrenal axis. Most tests of the theory have examined threats associated with social evaluation of a performance. Two experiments examined the effects of threatened social evaluation of one's physique. In Experiments 1 (n = 50) and 2 (n = 40), participants allocated to an experimental (threat) condition had significantly higher post-manipulation cortisol than participants in a control (no threat) condition. In Experiment 1, perceptions of social-evaluative threat were significantly correlated with post-manipulation cortisol levels. These results suggest that the threatened social evaluation of one's body can activate the cortisol response. Women who frequently experience such threats may be at increased risk for a variety of health conditions associated with chronic cortisol exposure.

Construct validation of a state version of the Social Physique Anxiety Scale among young women.

This study examined the validity of a state version of the Social Physique Anxiety Scale (Hart, Leary & Rejeski, 1989) by conducting tests of concurrent and discriminative validation. Participants were four separate samples of young women (N=221) who exercised ≤ 2 days/week and who participated in various experiments examining body image and self-presentation. Participants' scores on the state SPAS (S-SPAS) were significantly correlated, in expected directions, with scores on both trait and state measures of body image and self-presentation, and with body mass index (BMI). In addition, S-SPAS scores discriminated between women who exercised in a mixed-sex versus a same-sex environment, but trait SPAS scores did not. Together, these results provide evidence of construct validity of a state version of the SPAS and demonstrate that social physique anxiety can be conceptualized and measured as a situational variable. The S-SPAS, rather than the trait SPAS, should be employed in experiments designed to detect differences in state social physique anxiety.

Self-presentational motives in eating disordered behavior: a known groups difference approach.

OBJECTIVE: This study investigated the role of self-presentation motivation across three groups with known differences in disordered eating behavior. METHODS: Female participants (N=131) were currently in-treatment for an eating disorder (n=39), deemed at-risk (n=46), or not-at-risk for an eating disorder (n=46). All participants completed general and physique-specific measures of self-presentation motivation. RESULTS: Results revealed significant moderate differences between groups. Those not-at-risk reported lower levels of self-presentation motivation across all measures compared to those in the other groups. Those at-risk reported significantly lower scores across global measures of self-presentation motivation, but not physique-specific motives, than those in-treatment. A discriminant function analysis demonstrated that self-presentation motivation correctly classified 63.4% of cases. DISCUSSION: Results suggest that self-presentation motives may be particularly salient for individuals at-risk or in-treatment for eating disordered behavior.