Hypoglyceamia (glycogen crash) 24 hours after run

[hopefulhalf]

I nearly fainted at work today, lost my footing and tbe world went black , also really felt like I was going to vomit.

Yesterday morning I ran 17k on an empty stomach (not unusual for me) came home and had a slice of cake. Later went out for a late lunch which although delicious was a bit carb-lite (meat with vegetables, no potatoes and a creamy dessert). I didn't feel hungry yesterday evening or this morning. But had this funny turn just as I was arriving at work. Could it have been glycogen depletion so long after the run ? Feel a bit better now (obviously have eaten) but wondering does there have to be another cause ?

[Runningonempty84]

I'm the same. I generally do all long runs "fasted", simply because I run early and feel sick if I go too soon after eating.

The exception is when I get into the very long runs on marathon training. Anything above around 18 miles, I do try and eat first as I get dizzy otherwise.

IME most distance runners I know are the same. We'll have big dinners the night before, but wouldn't occur to me and my running buddies to eat before a standard long run.

[hopefulhalf]

Well I feel fine now, but have tried to eat more regularly all week. I go out first thing so difficult to eat first.

[emmathedilemma]

Closer to 11 miles and hats off to anyone who can run that's distance without food! it doesn't sound like you ate much for the day, and a lot of your calories will have been from the cake and dessert so sugary rather than nutritious food. Have you had your blood pressure checked?

[MrsJamin]

Have a read of this www.triathlete.com/2019/09/nutrition/ask-stacy-fasted-training-avoiding-gi-distress-and-managing-carb-intake_382864 - Dr Stacy Sims who specialises in nutrition for female endurance athletes explains how fasted training is a good idea for young men but not women. Her book Roar is excellent and full of good advice.

[hopefulhalf]

No was a bit faster than usual but nothing much

[Runningonempty84]

Doubt it - 17k is only what, 9 miles? Surely cake, and lunch, and dessert, would be enough to fuel you up after that. Unless the distance and/or speed was significantly out of your comfort zone, I'd think it's something else?

[hopefulhalf]

Fit and healthy 44 yo. No diabetes or anything like that BMI 21.5.