Short-term exercise training improves aerobic capacity with no change in arterial function in obesity

Area of Science:

• Cardiovascular Physiology
• Metabolic Health
• Exercise Science

Background:

• Obesity and metabolic syndrome (MetSyn) are associated with impaired arterial function and glucose tolerance.
• Understanding the impact of exercise interventions on these parameters is crucial for cardiovascular risk reduction.

Purpose of the Study:

• To investigate the effects of a 10-day high-intensity exercise program on arterial function and glucose tolerance in obese individuals with and without MetSyn.
• To assess the influence of acute hyperglycemia on arterial parameters in this population.

Main Methods:

• Obese participants (n=26) with and without MetSyn underwent 10 days of high-intensity treadmill exercise (1 h/day).
• Aerobic capacity, flow-mediated dilation (FMD), and pulse wave velocity (PWV) were measured pre- and post-training.
• Measurements were taken in fasted and post-hyperglycemic states.

Main Results:

• Aerobic capacity significantly improved in both groups post-exercise.
• No significant changes were observed in body weight, FMD, or PWV following the exercise intervention.
• Acute hyperglycemia led to a decrease in FMD and an increase in central PWV, indicating impaired arterial function.

Conclusions:

• A short-term high-intensity exercise program can enhance aerobic capacity and glucose tolerance in obese individuals.
• The intervention did not improve arterial stiffness or endothelial function.
• Acute hyperglycemia negatively impacts arterial function, highlighting potential daily risks for individuals with glucose dysregulation and increased cardiovascular risk.