A block may not involve what type of action?

In volleyball, a block is primarily an action that involves positioning and movement to intercept the ball as it crosses the net. Specifically, it requires proper foot movement, leg positioning, and arm positioning to create an effective barrier against an opponent's attack. However, wrist action is not a primary component of blocking. During a block, players aim to extend their arms over the net and use their hands to create a solid wall. The wrist remains relatively flexible, but it is not a focus during the blocking process. The effectiveness of a block comes from the player's ability to position their body and arms correctly while timing their jump, rather than manipulating the wrist to direct the action.