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Background <p>Exercise-physiology models posit that habitual physical activity and central adiposity are linked to cognition via stress reactivity and sleep-dependent memory consolidation pathways.</p> Objective <p>To examine associations amongst PA, abdominal adiposity, perceived stress, and sleep-dependent memory consolidation in adolescent girls, and to test perceived stress as a mediator.</p> Methods <p>In this cross-sectional study, 371 girls (13–17&#xa0;y) from Qazvin City were classified as abdominal obesity + low PA (BMI ≥ 95th percentile; IPAQ-Short &lt; 600 MET-min·wk⁻<sup>1</sup>) or no abdominal obesity + sufficient PA (BMI 15–85th percentile; ≥ 600 MET-min·wk⁻<sup>1</sup>). Measures included the DEBQ, Adolescent Stress Questionnaire (ASQ), PSQI, IPAQ-Short, anthropometry (BMI; waist/hip where feasible), and a paired-associate visual memory task with learning and delayed recall across an overnight interval. Group differences were tested using ANCOVA adjusted for age and socioeconomic status (SES); sensitivity models additionally adjusted for PSQI. Mediation was evaluated with PROCESS model 4 (5000 bias-corrected bootstrap samples).</p> Results <p>The no abdominal obesity + sufficient PA group showed lower perceived stress and higher delayed-recall accuracy than the abdominal-obesity + low PA group (all <i>p</i> &lt; 0.05; partial <i>η</i><sup>2</sup> range = 0.21–0.65). However, indirect effects via perceived stress were not significant for delayed recall (95% BCa CI included zero).</p> Conclusions <p>Amongst adolescent girls, higher PA and lower central adiposity were associated with better sleep-dependent memory consolidation and lower perceived stress, but perceived stress did not mediate these relations. Prospective trials incorporating objective PA/fitness, stress-reactivity indices, and sleep monitoring are warranted.</p>

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Eating behaviours, stress, and memory consolidation in adolescents: the mediating role of stress in abdominal obesity

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Siavash Naddafha,
  • Mandana Sangari,
  • Fateme Babaii,
  • Zohreh Eskandari

摘要

Background

Exercise-physiology models posit that habitual physical activity and central adiposity are linked to cognition via stress reactivity and sleep-dependent memory consolidation pathways.

Objective

To examine associations amongst PA, abdominal adiposity, perceived stress, and sleep-dependent memory consolidation in adolescent girls, and to test perceived stress as a mediator.

Methods

In this cross-sectional study, 371 girls (13–17 y) from Qazvin City were classified as abdominal obesity + low PA (BMI ≥ 95th percentile; IPAQ-Short < 600 MET-min·wk⁻1) or no abdominal obesity + sufficient PA (BMI 15–85th percentile; ≥ 600 MET-min·wk⁻1). Measures included the DEBQ, Adolescent Stress Questionnaire (ASQ), PSQI, IPAQ-Short, anthropometry (BMI; waist/hip where feasible), and a paired-associate visual memory task with learning and delayed recall across an overnight interval. Group differences were tested using ANCOVA adjusted for age and socioeconomic status (SES); sensitivity models additionally adjusted for PSQI. Mediation was evaluated with PROCESS model 4 (5000 bias-corrected bootstrap samples).

Results

The no abdominal obesity + sufficient PA group showed lower perceived stress and higher delayed-recall accuracy than the abdominal-obesity + low PA group (all p < 0.05; partial η2 range = 0.21–0.65). However, indirect effects via perceived stress were not significant for delayed recall (95% BCa CI included zero).

Conclusions

Amongst adolescent girls, higher PA and lower central adiposity were associated with better sleep-dependent memory consolidation and lower perceived stress, but perceived stress did not mediate these relations. Prospective trials incorporating objective PA/fitness, stress-reactivity indices, and sleep monitoring are warranted.