Nadine Messerli-Bürgy1,2, Antje Horsch3,4, Christian Schindler5, Anaëlle Boichat6, Susi Kriemler7, Simone Munsch8, Bertrand Crottet9, Pedro M Marquez-Vidal10, Ayala Borghini11, Jardena J Puder12. 1. Clinical Child Psychology & Biological Psychology, Department of Psychology, University of Fribourg, Fribourg, Switzerland, Nadine.messerli@unifr.ch. 2. Obstetric Service, Department Women-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland, Nadine.messerli@unifr.ch. 3. Institute of Higher Education and Research in Healthcare, University of Lausanne and Lausanne University Hospital, Lausanne, Switzerland. 4. Neonatology Service, Department Women-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland. 5. Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland. 6. Institute of Sport Studies, University of Lausanne, Lausanne, Switzerland. 7. Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland. 8. Department of Clinical Psychology and Psychotherapy, University of Fribourg, Fribourg, Switzerland. 9. Service of Pediatric Endocrinology, Diabetology and Obesity, Lausanne University Hospital, Lausanne, Switzerland. 10. Department of Medicine, Internal Medicine, Lausanne University Hospital, Lausanne, Switzerland. 11. University Service of Child and Adolescent Psychiatry, Lausanne University Hospital, Lausanne, Switzerland. 12. Obstetric Service, Department Women-Mother-Child, Lausanne University Hospital, Lausanne, Switzerland.
Abstract
OBJECTIVE:Physical activity (PA) may influence acute stress reactivity in children differently depending on their weight. This randomized controlled trial investigated the impact of acute PA and of BMI status (overweight/obese (OB/OW) and normal weight (NW) on stress reactivity. METHOD:50 prepubertal children (24 OW/OB and 26 NW) were randomly assigned to the PA or sedentary arm (SED) for 30 min followed by a stress task. Salivary cortisol, blood pressure (BP), and heart rate (HR) were measured. RESULTS: An interaction effect between the randomization arms and weight status on salivary cortisol was found after the stress task (p = 0.04). Cortisol increased in the SED, but not in the PA arm (p = 0.004 for differences in time course) of NW children. Time course did not differ between both arms in OW/OB children (p = 0.7). OW/OB SED children had a flat cortisol course, and levels were reduced compared to the NW SED or the OW/OB PA children (p ≤ 0.03). Systolic BP increased only in the SED arm (p = 0.01). HR was higher in the PA than in the SED arm during stress (p < 0.001) and showed different time courses (p = 0.006). CONCLUSION: PA impacted on acute stress reactivity and influenced stress reactivity differently in NW and OW/OB children.
RCT Entities:
OBJECTIVE: Physical activity (PA) may influence acute stress reactivity in children differently depending on their weight. This randomized controlled trial investigated the impact of acute PA and of BMI status (overweight/obese (OB/OW) and normal weight (NW) on stress reactivity. METHOD: 50 prepubertal children (24 OW/OB and 26 NW) were randomly assigned to the PA or sedentary arm (SED) for 30 min followed by a stress task. Salivary cortisol, blood pressure (BP), and heart rate (HR) were measured. RESULTS: An interaction effect between the randomization arms and weight status on salivary cortisol was found after the stress task (p = 0.04). Cortisol increased in the SED, but not in the PA arm (p = 0.004 for differences in time course) of NW children. Time course did not differ between both arms in OW/OB children (p = 0.7). OW/OB SED children had a flat cortisol course, and levels were reduced compared to the NW SED or the OW/OB PA children (p ≤ 0.03). Systolic BP increased only in the SED arm (p = 0.01). HR was higher in the PA than in the SED arm during stress (p < 0.001) and showed different time courses (p = 0.006). CONCLUSION: PA impacted on acute stress reactivity and influenced stress reactivity differently in NW and OW/OB children.
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