What is an illegal throw in hammer throw?

An illegal throw in hammer throw occurs when the athlete fails to adhere to specific rules during the execution of the throw. Common infractions include stepping outside the throwing circle before the hammer lands, failing to release the hammer from within the circle, or improper grip and technique. Additionally, if the hammer touches the ground outside the designated sector or if the athlete does not complete the throw within the allowed time, it is also considered illegal. Such violations result in a no-mark for the throw.