To compare cardiovascular, respiratory, metabolic, and microvascular responses to CPET in adolescents with T1D and healthy peers, highlighting the significance of these comparisons.
Key Findings:
Adolescents with T1D had a lower V̇O2/power output slope and higher ventilatory equivalent for oxygen at maximal effort, indicating altered oxygen uptake efficiency.
Maximal power output and maximal oxygen consumption were similar between groups, suggesting preserved overall exercise capacity.
Heart rate responses and heart rate variability were comparable across both groups, indicating no significant autonomic dysfunction.
Finger skin blood flow and cutaneous vascular conductance were significantly lower in the T1D group at rest and during recovery, highlighting potential microvascular impairments.
Interpretation:
Despite similar overall exercise capacity, adolescents with T1D exhibited altered metabolic, respiratory, and microvascular responses, indicating potential peripheral mechanisms affecting oxygen utilization and vascular function, which may have implications for their long-term health.
Limitations:
Small sample size may limit generalizability and increase the risk of type I error.
Short duration of exercise testing may not capture all physiological responses, particularly in a dynamic condition like exercise.
Conclusion:
The study highlights the need for further investigation into the early cardiovascular and microvascular changes in adolescents with T1D during exercise, particularly focusing on interventions that could mitigate these alterations.
