Type 1 diabetes mellitus (T1DM) is usually diagnosed during childhood. The body is unable to produce insulin so people with the condition require daily injections of insulin to regulate their blood sugar levels. There is currently no cure for T1DM and adopting lifestyle changes, such as regular exercise, will not make the condition go away. However, remaining physically active can improve your overall health.
Regular, moderate exercise has a significant effect on acute and chronic glycaemic control. There have been insufficient studies to determine the optimal type of exercise that will help with T1DM, however, aerobic training has been shown to improve cardiorespiratory fitness and reduce insulin resistance. People with T1DM diabetes are at a higher risk of experiencing hypoglycaemic events; however, brief periods of high intensity exercise can minimise this risk. There is also an overall reduction in mortality rates in those patients who undergo regular physical activity. The data is less well defined with regards to resistance training. Performed in combination with aerobic exercise, it likely has a beneficial effect, but the scientific evidence for it is limited.
Of course, patients with T1DM need to remain aware of their blood sugar levels both before and after exercise. Most beneficial effects are observed when exercise is undertaken in the postprandial period (1-3 hours after consuming a meal). However, if blood sugar levels fall below 100mg/dL or rise above 250mg/dL, additional care is warranted and stabilisation of levels should be obtained before exercise commences.