From: Resources to Guide Exercise Specialists Managing Adults with Diabetes
Every person with diabetes is different, tailor the exercise plan to meet individual needs. | |
Assess the presence and severity of diabetes complications. | |
If previous foot or nerve problems check feet for blisters and ulcers before and after exercise. | |
Individuals with foot ulcers should avoid weight-bearing exercise that puts pressure on foot wounds. | |
When beginning or modifying an exercise program, monitor glucose for several hours before and after exercise to observe the trend. | |
Use of continuous glucose monitoring (via a transcutaneous sensor) provides greater detail regarding glucose changes, allowing finely-tuned medication adjustment. | |
Hypoglycaemia is the main risk for people with diabetes that exercise. It may lead to a loss of consciousness and a diabetic coma, that is life threatening. | |
For a person with type 1 diabetes about to exercise at a high intensity, a small correction insulin dose is recommended if glucose is > 6.9 mmol/L. This dose can be then taken away from next meal bolus. | |
People with diabetes should consider exercising with a partner to assist in the detection of hypoglycaemia. | |
Be aware of the timing of medication administration; in particular, be aware of insulin action profiles (e.g. for short/rapid-acting vs long-acting insulins). | |
Consider effects of other medications: e.g. diuretics—fluid balance. e.g. beta-blockers—attenuate heart rate response to exercise; may mask hypoglycaemia symptoms of palpitations/racing heart. e.g. sodium-glucose co-transporter-2 (SGLT2) inhibitors—may cause severe acidosis with relatively normal glucose levels [31]. If feeling unwell after starting an SGLT2 inhibitor, postpone exercise and seek medical review. | |
A person with type 1 diabetes taking an SGLT-inhibitor must be able to check ketones due to risk of ketosis including euglycaemic ketosis [31]. | |
Awareness of the 15 min delay between a blood glucose reading and a continuous glucose monitor’s (CGM’s) interstitial reading is important when planning exercise, especially when glucose level is low (e.g. a hypoglycaemic event has been treated and the blood glucose level is 5.5 mmol/L but the CGM may be measuring 4.5 mmol/L due to the delay). | |
Diabetes may lead to cardiac autonomic dysfunction and a blunted heart rate and blood pressure response to exercise. Therefore, additional monitoring of blood pressure and the use of a rating of perceived exertion (RPE) to monitor exercise intensity may be needed. | |
Insulin sensitivity varies diurnally, therefore different glucose responses may be observed with the same exercise undertaken at different times of the day. | |
One of the safest times to exercise with the lowest variation in glucose response to exercise (i.e. easier to predict) is in the morning before breakfast (dependent on glucose level). | |
A person with a glucose level frequently within the red area of the Action Plan should be reviewed by a Diabetes Healthcare Professional. | |
Individuals with retinopathy should avoid higher intensity aerobic and resistance exercises (with large increases in systolic blood pressure), head-down activities, jumping or jarring activities. These all increase haemorrhage risk. | |
Appropriate fluid intake is necessary to minimize dehydration and risk of heat stress. Increasing fluid intake is important when the glucose level is high. |