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Type 1 Diabetes
Managing exercise and insulin
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<blockquote data-quote="SimonP78" data-source="post: 2691755" data-attributes="member: 556474"><p>Is it about duration though with the bike rides (along with a lower intensity so you don't end up with a large glucose dump throughout the event)? </p><p></p><p>I'm guessing a half-marathon is short enough that it can be run solely on the glycogen contents of the liver + muscles (which may well have been dumped into your blood stream faster than desired due to the higher intensity), though never having run one I could be wrong! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Intensity will be lower on the bike (for a long ride) which prevents the initial spikes (though I can still manage to spike at the start through stress hormones/wrong dose for breakfast) and if you're riding for a long time your liver will run out of glycogen stores - I find somewhere between 1h30 and 3h is the point at which I usually to start eating something (depending on how much of an initial spike there was and how hard I'm riding) - 1h30 does seem quite a short time (for hepatic depletion at a low work-rate), but my guess is that is partly due to residual bolus from breakfast/FotF cover. </p><p></p><p>I have a diabetic colleague who runs ultras, I must ask him how his BG responds when running different distances (which I assume must mean different intensities).</p></blockquote><p></p>
[QUOTE="SimonP78, post: 2691755, member: 556474"] Is it about duration though with the bike rides (along with a lower intensity so you don't end up with a large glucose dump throughout the event)? I'm guessing a half-marathon is short enough that it can be run solely on the glycogen contents of the liver + muscles (which may well have been dumped into your blood stream faster than desired due to the higher intensity), though never having run one I could be wrong! :) Intensity will be lower on the bike (for a long ride) which prevents the initial spikes (though I can still manage to spike at the start through stress hormones/wrong dose for breakfast) and if you're riding for a long time your liver will run out of glycogen stores - I find somewhere between 1h30 and 3h is the point at which I usually to start eating something (depending on how much of an initial spike there was and how hard I'm riding) - 1h30 does seem quite a short time (for hepatic depletion at a low work-rate), but my guess is that is partly due to residual bolus from breakfast/FotF cover. I have a diabetic colleague who runs ultras, I must ask him how his BG responds when running different distances (which I assume must mean different intensities). [/QUOTE]
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