Starting blocks are devices used in track and field events, particularly in sprinting races. They provide athletes with a stable base to push off from at the beginning of a race. Made of metal or plastic, starting blocks have adjustable foot placements to accommodate different runners' preferences and leg lengths. Runners place their feet in the blocks and use them to gain maximum speed as they launch forward. The use of starting blocks helps improve acceleration and overall performance in events like the 100 meters and 200 meters. Proper technique in using starting blocks can significantly impact a runner's race time.