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Article Dans Une Revue Obesity Facts Année : 2016

Improving Peripheral and Central Vascular Adjustments during Exercise through a Training Program in Adolescents with Obesity

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OBJECTIVE:The effects of a training program (TP) on muscle microvascularization during exercise remained to be explored in adolescents with obesity. We hypothesized that a TP would lead to better microvascular adaptations to exercise in skeletal muscle. METHODS: 15 inactive adolescents followed a 12-week TP where both peripheral (muscular microvascularization) and central (cardiac) adaptations to exercise (40 min exercise set at 70% V̇O2peak) were assessed before and after intervention. Microvascular adaptations were evaluated in the Musculus vastus lateralis with near-infrared spectroscopy, by measurement of muscular blood volume (IR-BV) and tissue oxygen saturation (IR-SO2). Central adaptations were evaluated using thoracic impedance. RESULTS: The TP favored lower BMI (p < 0.001), lower total and abdominal fat (p < 0.001), and a trend for the decrease in insulin resistance index (p = 0.07). V̇O2peak relative to weight (p = 0.008) and maximum power output increased (p = 0.0003). A smaller initial drop in IR-BV and IR-SO2 (p < 0.001), a prompter return of these parameters to their base values, and a higher IR-BV and IR-SO2 all times taken together (p < 0.001) were observed after completing the TP. Concerning central adaptation, cardiac output decreased (p < 0.001). CONCLUSION: We demonstrate for the first time by noninvasive techniques that a training program induces peripheral and central vascular adaptations to exercise in adolescents with obesity.
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hal-01601665 , version 1 (27-05-2020)

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Valérie Julian, David Thivel, Bruno Pereira, Frédéric Costes, Ruddy Richard, et al.. Improving Peripheral and Central Vascular Adjustments during Exercise through a Training Program in Adolescents with Obesity. Obesity Facts, 2016, 9 (5), pp.321-331. ⟨10.1159/000447456⟩. ⟨hal-01601665⟩
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