Looking at contemporary hunter gatherers, they seem to have fairly chill schedules. ofc there could be a bias due to that way of life remaining only in very few areas, and particularly in areas were natural food sources are abundant, but afaik the consensus is that in such societies, you spend roughly 4 hours a day hunting and gathering, and that generally happens at a steady leisurely walking pace.

But there are just some high stress situations were you need to hurry, and i know that high levels of exertion-related neurotransmitters lead to faster bowel movements. When you get your metabolism going, that just speeds up your digestion.