The game of futsal is played on playgrounds of 38 and 42 meters long and between 20 and 25 meters wide; although according to FIFA regulations, the minimum size of the court can be 25 meters long and 16 meters wide.
Harder soccer is a fast paced and intense kind of soccer. People tackle harder and there are less restrictions from the referee.
They're typically flat-soled, which doesn't provide much protection from the trauma to the ankle that runs all the way up to the spine you'll experience from long-distance running. Getting a pair specifically for jogging would be best.
The court for futsal (indoor soccer) varies according to age group, and by the available space of the gymnasium or other facility.
The official sizes for US competitive futsal (USFF) are at the related link below.