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A Chronic High-Intensity Interval Training and Diet-Induced Obesity Model to Maximize Exercise Effort and Induce Physiologic Changes in Rats
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Exercise and Vascular Function in Child Obesity: A Meta-Analysis.

Katrin A Dias1, Daniel J Green2, Charlotte B Ingul3

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Exercise training significantly improves vascular function in overweight and obese children, enhancing flow-mediated dilation (FMD). This intervention also boosts cardiorespiratory fitness (peak oxygen consumption), crucial for cardiovascular health in this population.

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Area of Science:

  • Pediatric cardiovascular health
  • Exercise physiology
  • Vascular function assessment

Background:

  • Flow-mediated dilation (FMD) is a key indicator of preclinical atherosclerosis.
  • Exercise interventions are known to improve FMD in various populations.
  • Overweight and obese children and adolescents represent a high-risk group for developing cardiovascular issues.

Purpose of the Study:

  • To systematically review and meta-analyze the impact of exercise training on FMD in overweight and obese youth.
  • To explore the relationship between cardiorespiratory fitness (peak oxygen consumption [Vo2peak]) and exercise-induced improvements in FMD.
  • To synthesize current evidence on exercise interventions for vascular health in at-risk pediatric populations.

Main Methods:

  • Comprehensive literature search of major databases (PubMed, Medline, Embase, Cinahl) up to February 2015.
  • Inclusion of studies focusing on overweight/obese children and adolescents undergoing exercise interventions.
  • Meta-analysis of data from 219 participants comparing pre- and post-intervention vascular function and Vo2peak.

Main Results:

  • Exercise training led to a significant improvement in FMD (mean difference 1.54%, P < .05) compared to control groups.
  • Participants in exercise groups showed a significant increase in Vo2peak (mean difference 3.64 mL/kg/min, P < .05).
  • Improvements in vascular function were observed across diverse exercise protocols and participant characteristics.

Conclusions:

  • Exercise training is effective in enhancing vascular function, indicated by improved FMD, in overweight and obese children and adolescents.
  • Cardiorespiratory fitness gains are associated with improvements in vascular health in this population.
  • Further research is needed to define optimal exercise prescriptions for long-term vascular health maintenance in at-risk youth.