I had hoped the article would provide more better concrete actions you can take to reduce the problem, because my stomach suffers hard. I gotta go to the toilet before even a casual 10 k recovery run or risk needing to stop my run early.

My one marathon was severely impacted by a sore stomach, though thanks to the pacer being significantly positively split I still hit my target time.

I've done several triathlons of Olympic distance and of roughly 1.5x Olympic distance, and I don't think I've ever once had one where my stomach felt good on the run.

And both marathons and even more so triathlons are such a specific difficult load on your body, it's not really like it's something you can easily test on your average training runs. The combination of intensity and length just doesn't make for good training most of the time. So opportunities to play around with different nutrition etc. to try and find a working solution are so rare.