Reasonable physical contact and fouls

At the moment, only the NBA has a reasonable collision zone. In the NBA, the center of the basket is the center of the basket, and the semicircle with a radius of 4 feet (meters) is called the reasonable collision zone. Standing within the arc, a defensive foul may be awarded as long as the defender makes physical contact with the offensive player.

In addition, the defender can stand up in advance, and if the offensive player touches the defender with his body, the offensive player will be sentenced to hit someone. In a reasonable collision zone, when the opponent is attacking, the defender will not be whistled for a foul if he jumps, and if he does not jump, he will be whistled for a defensive foul.

The defensive foul you said is often a blocking foul, and the gap between hitting people with the ball and blocking is very blurred, especially under the premise of high-speed movement of players on both sides, the referee often relies on a professional keen blow, not every time can be observed with the naked eye without flaws, which is why once the whistle appears on the court, the referee's gesture is to hit or block with the ball, and the player on the unfavorable side of the penalty will almost come forward and say a few words to the referee.

Usually the fundamental principle of the referee's blowing penalty is that the position determines everything, and in layman's terms, whoever occupies the advantageous position first will produce a favorable penalty for him. Of course, all basketball rules will determine whether there is an additional push or shoving action of the arms or feet of both players in this situation, and if such action occurs, it will lead to an unfavorable penalty. In addition, in the NBA's space rules, if a defender blocks the path of an attacking player, the attacking player should be given the time and distance to change direction, which is usually a one-step distance by default.

If the defending player is in position and maintains the distance from the attacking player or above, and there is still a physical collision, it is judged that the person is hit with the ball; If the defender is in position and does not keep a reasonable distance, it can be considered blocked; In both cases, because the players on both sides of the offensive and defensive sides were moving, sometimes there was a slight difference due to the different perspectives of each person, and when the offensive players were moving at high speed, even if there was room for a step, they could not turn or stop due to inertia.

In the NBA's three-second zone, there is a semi-circular arc line, and the above rules for hitting people with the ball do not apply to the physical collision behavior of the arc near the baseline side. In order to encourage offense and enhance the spectacle of the league, the league determines that the player who moves with the offensive ball in the space on the side of the baseline of the arc will not be blown into the ball and hit the defender, in other words, only the penalty of defensive blocking will occur in the area, but this rule applies only if the offensive player is not malicious and unsportsmanlike, assuming that the offensive player with the ball uses this rule to attack the defender with a hurtful action. The referee may impose penalties on the applicable rules of sportsmanship and court safety, such as malicious fouls.

I don't know if you're clear?

Layup body contact Definitely foul It is not allowed to block the opponent's path with the body The circle under the basket is a reasonable body collision zone No offensive fouls.

There is a reasonable collision zone in the NBA, and there is no reasonable collision zone in FIBA, usually playing, if someone else takes 3 steps to make a layup and the first step is up, and you are on someone else's forward route and do not fully stand, the so-called complete standing is that your center of gravity is not moving, if you move, you will foul, as for the normal body contact when dribbling, you violate other people's cylinders, pay attention to the so-called body contact is not next to each other, it is more obvious, such as beating, pushing, tripping, etc!!

If it's in a reasonable collision zone, don't blow it! It's the little semicircle inside.

In the NBA, there are reasonable impact zones, where a collision is reasonable physical contact and does not count as a foul. Usually playing ball or international league, the defender does not move before the offensive player takes three steps, and if the defender is stuck in position, it is considered an offensive foul. If the attacker does not take three steps and plays one-on-one, if the attacker has a significant collision or push, it is considered a foul, but the attacker pushes the opponent with his back and plays with one hand.

The above is my understanding, I hope it can be of some help to you.

You have to fight more, watch more, and learn more.

Don't blow when you collide reasonably.