Tunnel Vision after long run

Training Advice/Discussion Marathon

5 years ago 10/12/2018 10:40am EDT

Ran a 16 mile long run a few weeks ago. Afterwards, I felt fine until 10 minutes post run, I started to get what I guess was tunnel vision on my post run walk. Tried not to panic and went into deli and grabbed a water and apple and chugged the water. Went back outside and felt dizzy again - feeling subsided about 3 min later.

Went to doc for blood tests and everything was normal, no anemia or concerning results. No heart issues.

I’ve run a few marathons and this never happened before. I drank 2 gatorades and 3 gels during run. Run started out with warm weather but last hour the weather was humid, sunny, 80 degrees - mostly uncomfortable

Doctor didn’t seem concerned and gave no reasoning or explanation for the dizziness.

Any insight? Perhaps dehydration mixed with heat and humidity but I’ve run in worse temps with less hydration before

5 years ago 10/17/2018 8:12pm EDT

re: Tunnelviz

5 years ago 10/17/2018 8:19pm EDT

re: Tunnelviz

Best guess is extreme fatigue due to heat. I've had a similar experience when I was low on electrolytes / sugar, but you say you had 2 gatorades and 3 gels so not sure why. If the runs weren't particularly hard, I'd treat the issues as a small bump and keep training, if it happens consecutively the next 2 weeks then definitely go back to the doctor.

5 years ago 10/17/2018 8:20pm EDT

re: Tunnelviz

From a quick google search I found nothing, my guess would be something to do with blood pressure.

5 years ago 10/17/2018 8:22pm EDT

re: Tunnelviz

Tunnelviz wrote:
Ran a 16 mile long run a few weeks ago. Afterwards, I felt fine until 10 minutes post run, I started to get what I guess was tunnel vision on my post run walk. Tried not to panic and went into deli and grabbed a water and apple and chugged the water. Went back outside and felt dizzy again - feeling subsided about 3 min later.
Went to doc for blood tests and everything was normal, no anemia or concerning results. No heart issues.
I’ve run a few marathons and this never happened before. I drank 2 gatorades and 3 gels during run. Run started out with warm weather but last hour the weather was humid, sunny, 80 degrees - mostly uncomfortable
Doctor didn’t seem concerned and gave no reasoning or explanation for the dizziness.
Any insight? Perhaps dehydration mixed with heat and humidity but I’ve run in worse temps with less hydration before

I have this after some tough efforts as well. Seems to be related to blood pressure or blood sugar.

5 years ago 10/17/2018 9:07pm EDT

re: Tunnelviz

I'm an optometrist and this is something we refer to as "transient visual obscurations". It is most likely associated with hypotention or hypoglycemia, but it can have other causes. I would recommend getting a **dilated** eye exam so the doctor can assess your optic nerve for any abnormalities. If this is normal, your labs are normal and it doesn't recur, I would't get too worked up about it. If it keeps happening or if you have any new symptoms (such as headaches), I would suggest neuroimaging (in the form of a MRI or CT) and maybe even a carotid ultrasound depending on your risk factors. Good luck!

5 years ago 10/17/2018 9:12pm EDT

re: Tunnelviz

Hypoglycemia. In other words, low sugar. Must have been hard long run or too little carbs before.

Reply Replying to

Username

Password

Leave the password field blank to post anonymously.

Post Preview

By posting you acknowledge that you have read and abide by our Terms and Conditions.

Remember me on this device.

Tunnel Vision after long run

Of General Interest

This thread has already been deleted.

You have been subscribed.

Tunnel Vision after long run

Follow Shade77

Block Shade77

Follow kid from PA

Block kid from PA

Of General Interest

This thread has already been deleted.

Reply Replying to

You have been subscribed.