Active Adults with Type 1 Diabetes Show Normal Exercise Response, Study Finds

Researchers wanted to know whether physically active adults with type 1 diabetes have different heart and lung responses during exercise compared to people without diabetes. They recruited 15 adults with type 1 diabetes (average disease duration of 15 years) and 33 healthy controls matched for age, sex, height, and body mass index.

All participants completed an incremental cycling exercise test while researchers measured cardiopulmonary function at rest and at different exercise intensities. They also asked participants to report their weekly physical activity levels.

The study found no statistically significant differences in heart and lung function between the two groups during exercise. Variables measured included oxygen uptake, ventilation, and cardiac function—all showed similar responses across both groups at rest, during moderate exercise, during harder exercise, and at peak effort.

Physical activity levels were also comparable between groups. While a statistical test detected a small difference in how often people reported light-intensity activity, this difference was not considered clinically meaningful.

For physically active adults with well-controlled type 1 diabetes, this study offers reassurance that their hearts and lungs respond to exercise similarly to people without diabetes. This suggests that type 1 diabetes itself—when uncomplicated—does not appear to impair the body's basic exercise capacity in active individuals.

However, researchers emphasize that larger studies are needed to confirm these findings and to explore whether there might be subtle differences in heart rhythm regulation or blood vessel function that this study was not designed to detect.

This study focused on a specific group: physically active adults with uncomplicated type 1 diabetes. Results may not apply to people with type 1 diabetes who are less active, or to those with complications related to their diabetes. Individual responses to exercise vary, and people with type 1 diabetes should work with their diabetes care team to manage blood sugar during physical activity.

Source: Physiological reports. Evidence type: PubMed indexed literature. Type1Cure is an information and intelligence hub, not a medical advice service. This article summarizes published research and does not provide diagnosis, treatment, or personal medical guidance. Always talk to your own care team before changing anything about your Type 1 diabetes management.