Social media exposure and appearance anxiety: A chain mediation model moderated by physical activity.

Social media exposure was positively correlated with appearance anxiety, ideal beauty internalization, and self-objectification.

• Cross-sectional survey of young social media users (N = 593)
• Hayes' PROCESS (v3.5.3) Model 92 was used with 5000 bootstrap resamples and 95% confidence intervals
• Effects were probed at the mean and ± 1 standard deviation of physical activity intensity

The indirect association between social media exposure and appearance anxiety via ideal beauty was statistically reliable at low, moderate, and high physical activity intensity.

• The ideal beauty indirect pathway was significant across all levels of physical activity intensity
• The indirect association via ideal beauty was larger at higher physical activity intensity
• Moderation of the ideal beauty-to-appearance anxiety path specifically was not supported

The indirect association via self-objectification was observed at moderate and high physical activity intensity but not at low intensity.

• The serial indirect association (social media exposure → ideal beauty → self-objectification → appearance anxiety) was also only observed at moderate and high intensity, not at low intensity
• This indicates pathway-specific moderation by physical activity intensity
• Physical activity intensity was associated with a stronger self-objectification-to-appearance anxiety link

Higher physical activity intensity was associated with a weaker direct link between social media exposure and appearance anxiety.

• Physical activity intensity moderated the direct social media exposure-appearance anxiety association in the opposite direction from the self-objectification pathway
• Physical activity intensity was associated with a stronger self-objectification-appearance anxiety link
• These opposing moderation patterns suggest that physical activity intensity has pathway-specific effects

The study identified pathway-specific moderation by physical activity intensity within a moderated serial mediation model of social media exposure and appearance anxiety.

• The overall model tested a chain mediation structure: social media exposure → ideal beauty → self-objectification → appearance anxiety
• Physical activity intensity moderated multiple but not all pathways within the model
• Findings suggest interventions should integrate media literacy with appropriately designed physical activity while considering exercise contexts that heighten appearance salience