Neither of those activities are subconcussive impacts. Stop reading foolishness.

If you ran or jumped hard enough to send an impact to your brain, you would traumatize your back, pelvis, hip socket, knee, and more.

If you did it running long distance, you would have heel bruises and possibly stress fractures in your shins. Modern running shoes reduce the likelihood of such an impact to near zero.

I was a distance runner in high school and college. I ran 50 to 100 miles a week. I ran in hiking boots in the morning on my paper route for 3 years in high school. My running shoes were Tigers, the predecessor to Asic running shoes. Tiger had no shock absorbing ability. I had to wear heal cups to prevent heal bruises. Never caused any problems, headaches, neck issues, etc.