I constantly have to poop after running

Try pooping before running ?

What time are you running? This is probably more the issue your poop schedule coincides with your running schedule. Need to figure out how to change your poop schedule. GL

The more consistent you can be with your eating and running schedules, the better you will be able to avoid in interfering with the other.

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Try pooping before running ?

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I can’t.

I take the most massive of dumps every time after I run. It gets everything moving and bouncing in my stomach.

I wake up early enough to drink a cup of coffee and read TD till I have to poop. I never run without pooping, especially if it’s anything over 5 miles. I’ve had some bad experiences

Take some Imodium prior to running

Eat earlier the day before. Takes 14-16 hours , but your time may vary.

went through a 2-3 spell where i had to stop midway every run. i'd sit on the toilet for 20 minutes trying to go before i left the house. but sure enough, it would hit during the run.

Then it just stopped. strange times.

You're not alone, but I don't have any answers for you. Light running load, 3-4 days/week for 12-15 miles.

I've done some experimenting and fine tuning and learned the following:
1. A new PR on a 5k will inevitably result in a blowout shortly following
2. Matching prior paces works fine out to 4 miles, no blowout.
3. The 5 mile mark is the danger zone. Do or die pending no stupid decisions like copious red pepper flakes the night before.
4. 10k means the rest of my day is back and forth to the bathroom.

My runs range from 5k to 10k, I have no idea what a longer run would do. This is partially because as it sits now, my 10k route ends at my toilet. I'm normally pretty good about cool down stretches, but not on 10k days.

Hopefully the insights help something. I've tried what people have suggested. It doesn't help for me.