At the onset of the jump, the ball is controlled by either one or both hands and once in the air is typically brought to chest level. The player will then quickly thrust the ball downwards and fully extend their arms, bringing the ball below the waist. Finally the ball is brought above the head and dunked with one or both hands; and the double clutch appears as one fluid motion. As a demonstration of athletic prowess, the ball may be held in the below-the-waist position for milliseconds longer, thus showcasing the player's hang time (jumping ability).
Step 3. Land squarely on the floor on both feet (again, around hip-width apart) and immediately jump as high as you can, straight up in the air. It’s important that you spend as little time as possible with your feet on the floor before the jump—it should be a split-second reaction. Don’t lower down into a squat before leaving your feet. Just let your hips and knees dip naturally, then extend them explosively to launch upward. Drive your arms straight up as you do so.
A study was carried out in 2015 to show the effectiveness of different shot types, including slam dunks. The study was carried out across five different levels of basketball (NBA, EuroBasket, the Slovenian 1st Division, and two minor leagues). Overall the study showed that slam dunks were a very effective way of scoring in the game of basketball, particularly in the NBA, which had the highest dunk percentage in the study.