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Message: <blockquote data-quote="Julian_Hands" data-source="post: 1301226" data-attributes="member: 324327">Hi, I don't do marathons but do Audax cycling with extended rides over 200km.Endurance exercises like this require careful control but once mastered can be superb.You can't just eat before you start and hope to burn it off as this will end in injury due to you blood not being able to get the glucose into your muscles.I Reduce my long acting basal insulin by a 1/5th the night before then reduce my bolus fast acting insulin by 50% with breakfast. I keep my blood glucose around 5-7 mmol/l by eating flapjacks and take energy gels, dextrose and jelly babies with me, just in case I start dropping fast. If I'm below 5mmol/l I'll take 6 dextrose tablets or 6 jelly babies plus eat some flapjack, the dextrose gives the boost and the flapjack gives endurance carbs that will last about 45 minutes.You need to balance your carbs with your bolus fast acting insulin as you can't not have any. You need insulin to process the glucagon you eat, just reduce else your have hypos.Good luck and don't let it beat you, it takes a bit of work but very rewarding once you've cracked it.</blockquote>

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