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Effects of exercise intensity on microvascular function in obese adolescents

Abstract : The optimal exercise modality for the improvement of health-related parameters and microvascular function in obese adolescents is not yet fully understood. Therefore, this study aimed to 1) compare the microvascular phenotype of obese and normal-weight adolescents; and 2) to determine the effects of a lifestyle intervention including three months of moderate continuous training (MCT) or high-intensity interval training (HIIT) on health-related parameters and microvascular function in 29 obese adolescents. Body composition, metabolic profile, aerobic fitness and cutaneous blood flow, measured using laser Doppler flowmetry at rest and during post-occlusive reactive hyperemia, were assessed prior to and following lifestyle intervention. Sixteen normal-weight adolescents were included as reference controls for baseline microvascular parameters. At baseline, obese adolescents had higher peak blood flow, peak vascular conductance and area under the curve for post-occlusive reactive hyperemia than normal-weight adolescents. Conversely, peak blood flow, peak vascular conductance and area under the curve data remained unchanged after MCT and HIIT without intergroup differences. However, the peak/basal blood flow ratio decreased in both MCT and HIIT groups without any interaction between groups due to basal CBF increase (tendency p=0.074). Exercise training, whatever the modality, does not improve peak microcirculatory function.
Mots-clés : microcirculation
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Article dans une revue
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https://hal.inrae.fr/hal-02621563
Déposant : Migration Prodinra <>
Soumis le : mardi 26 mai 2020 - 02:52:50
Dernière modification le : mercredi 18 novembre 2020 - 03:09:43

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Christopher Morrissey, David Montero, Cécile Raverdy, Delphine Masson, Marie Josèphe Amiot, et al.. Effects of exercise intensity on microvascular function in obese adolescents. International Journal of Sports Medicine, Thieme Publishing, 2018, 39 (6), pp.450 - 455. ⟨10.1055/a-0577-4280⟩. ⟨hal-02621563⟩

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