Effect of Physical Activity on Self-Concept: Theoretical Model on the Mediation of Body Image and Physical Self-Concept in Adolescents.

This model also included the effect of BD on GSC, whose coefficient was close to the level of significance ( β = −0.28, p = 0.05).

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This model included the effect of PA on BD, which demonstrated a standardized coefficient very close to significance, but without reaching it ( β = −0.10, p = 0.05).

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After comparing the last two models, no statistical difference was apparent (Δχ 2 = 1.395, Δ df = 1 , p = 0.237), so we accepted the model A4 as the final model since it showed a better parsimony fit index (AIC = 111.666).

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