How is Futsal safer?
Eliminating walls makes soccer safer but there are other aspects of Futsal which make it safer as well. Besides fewer broken bones and concussions (which too often occur in hockey-rink walled soccer), there are fewer high speed collisions because the field is shorter. You don’t develop the same full head of steam running for the ball in Futsal and consequently have less of those related injuries. Finally, a game which emphasizes control under pressure versus kick and run inevitably leads to more heads-up play. In general, it is safer by virtue of the fewer injuries due to the nature of the arena and the game.