# Running a marathon! :D **URL:** \ **Category:** Sports & Exercise\ **Created:** [December 24, 2019, 5:33pm UTC](https://forum.fudiabetes.org/t/running-a-marathon-d/8963 "2019-12-24T17:33:21Z")\ **Posts on this page:** 1\ **Showing post:** 38
**Author:** ![LarissaW](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/larissaw/32/5754_2.png) [@LarissaW](https://forum.fudiabetes.org/u/LarissaW)\ **Post date:** [January 2, 2020, 4:45pm UTC](https://forum.fudiabetes.org/t/running-a-marathon-d/8963/38 "2020-01-02T16:45:47Z")
> [@Trying](#): > > I do tend, but not always, have a spike after the run. But then, that has always been the case even before I used Huma. Me too, typically! Regardless if I take any carbs while running sometimes. @Eric had a really awesome and comprehensive write up on this that I’m pasting below if anyone’s reading through this thread and is also curious about that rise after finishing running > [@Running with OmniLoop](https://forum.fudiabetes.org/t/running-with-omniloop/7533/180): > > Very good summary of factors! Some ways of looking at it, depending on the type of run, distance, and intensity: Your body can only oxidize a certain amount of carbs during exercise. The general rule-of-thumb is no more than 1 gram per minute (but actually you can increase this to 1.75 g/min using different substrates such as combining fructose and glucose. Topic for another day!). All the other carbs will hit later. The max rate of oxidation can be reduced even more with higher intensit… --- _[View the full topic](https://forum.fudiabetes.org/t/running-a-marathon-d/8963)._