5 Killer Quora Answers on running surfaces
https://wiki-view.win/index.php?title=How_to_Create_an_Awesome_Instagram_Video_About_running_tracks
Asphalt - Now you would think that asphalt is just as bad as concrete, but it is not. It's actually about 8 times "softer". The genuine issue with working on asphalt roadways is not the solidity, but the camber