Answer:
Starting blocks are a device used in the sport of track and field by sprint athletes to brace their feet against at the start of a race so they do not slip as they stride forwards at the sound of the starter's pistol. The blocks also enable the sprinters to adopt a more efficient starting posture and isometrically preload their muscles in an enhanced manner. This allows them to start more powerfully and increases their overall sprint speed capability.
Step-by-step explanation: