This compression system is a very handy invention, especially for Web users, because it lets you reduce the overall number of bits and bytes in a file so it can be transmitted faster over slower Internet connections, or take up less space on a disk.
Concrete hardens to 600PSI (Minimum) after 24 hours. This means that 5 three grown men could all stand on a pogo stick (if that were possible) who's base covers 1 square inch without harming the concrete. You walking with shoes on exert about 10 PSI, well below anything that could damage the new pour.
If you are not already walking long distances when you work out, then you are going to need to start at square one to build up your endurance. Typically, the average person may walk just a couple of miles everyday to get exercise. It can take up to 30 minutes for you to walk this distance. Building up endurance takes more time, though. Ideally, you want to start off an endurance walking workout by stretching your legs and arms thoroughly before you start.