Do you have bad knees।
Bad knees can be a disturbing thing. Playing and running outside on the concrete can result into having bad knees do to your knees bumping against each other due to the hardness of the concrete.
Running playing basketball or any other sport, I recommend that you do these activities on a regulated facility.
Avoiding bad knees I secjust he/she stay away from the concrete. It is bad for your knees. If you already have bad knees, its good that you support your knees with braces, and I recomend you to go see a knee doctor until the mean time wear the braces to support your legs.