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hypo

That would depend on many factors such as: assuming you're on a basal/bolus insulin regime is your basal insulin correctly calculated to keep your bg steady throughout the day (fasting tests can help to determine this), when last did you inject fast acting insulin and how much did you inject, did you correctly match your insulin to the amount of carbs you ate, what type of food did you eat at your last meal (some foods have a lower gi than others), how quickly insulin lowers your bg is different for everyone as some people are more sensitive than others, where you injected insulin can alter how quickly it works, different insulins have a different time profile so depends on what fast acting insuling you're using, time of day can also have an impact on this as some people find they're more insulin resistant in the mornings compared to afternoons.
 
thanx sophia, i'm basically on humalog mix 25 fast and slow acting insulin, inject twice daily , thinking about doing exercise but am worried that it will effect my levels , theres's only one way to find out i guess ? .
 
You're right, only one way to find out is to do the exercise and test a lot to see how your blood glucose reacts. We've found keeping a routine i.e. same exercise at same time of day for same duration is much easier to work out how to manage it. There's a website called runsweet which provides a lot of info about exercise and diabetes so perhaps have a read there. Make sure you have some hypo treatment and your test meter with you incase your blood glucose drops too low and watch it after exercise too. My daughter had sports day yesterday where she was active all morning and afternoon, she was running low all through the night despite eating extra carbs and reducing her basal insulin, the exercise can lower bg even hours after you've finished exercising.
 
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