Using the bathroom during a run is common but exercise does not cause incontinence.
Exercise can actually reduce the need to urinate.
Exercise can also stimulate the bowels, potentially improving constipation.
Running mechanics can also influence the need to go.
If you decide to hold it, it probably won’t hurt your system but it can become a bad habit.
Bowel health, after all, is an important part of a healthy lifestyle.
Read the full article here: https://apexptwellness.com/runners-poops-should-you-go-during-a-race/