It is recommend that you check your blood sugar about 30 minutes prior to exercising to ensure your blood sugar level is healthy enough for you to begin exercising. While your physician may set individual goals with you, some general guidelines from The Mayo Clinic include:
- Less than 100 mg/dL (5.6 mmol/L): Refrain from exercising until you have eaten a high-carbohydrate snack. This includes fruit, half a turkey sandwich, or crackers. You may wish to re-check your blood sugar before exercise to ensure it is in the proper ranges.
- Between 100 and 250 mg/dL (5.6 to 13.9 mmol/L): This blood sugar range is an acceptable one for when you begin exercising.
- 250 mg/dL (13.9 mmol/L) or higher: This blood sugar level may indicate the presence of ketones. This means your body does not have enough insulin to support your current blood glucose levels. You typically can test your urine for the presence of ketones. If they are present, refrain from exercising until your blood sugar levels have decreased.
- 300 mg/dL (16.7 mmol/L) or higher: This indicates hyperglycemia, which can be worsened by exercise in people with type 1 diabetes who are insulin-deficient and ketotic. People with type 2 diabetes rarely develop such a profound insulin deficiency, and do not usually need to postpone exercise because of high blood glucose, so long as they are feeling well and remember to stay hydrated.
Always be smart with your exercising habits, please. I know the general idea with goals and fitness is to basically “don’t stop when it hurts, stop when you are done” type mentality, but there is a huge difference between pushing yourself when you are struggling (because lets face it, we all have those moments we want to throw in the towel!), and actually harming yourself.
Overdoing it is not beneficial to your health – its detrimental! No one wants that. So be safe and smart! 🙂