Running requires resting for me, and I often do not have time to rest longer with the kids. Meals still need to be prepared, and kids need to be minded. Kids have a strict time to go to kinder garten so I still need to get up at 7.00 or 7.30AM. I don't have grandparents around, just me and my wife.

So if I am exhausted of a run and cannot rest or sleep, it is almost sure I get sick soon after. Just my experience.