How can I defend myself in basketball so as not to let others pass me?

First of all, attitude, defense should be firm, not afraid. Secondly, physical fitness depends on what kind of opponent your physical fitness is suitable for defending. For example, your 170 will definitely make you unable to prevent 190. Height and strength are both disadvantages. Conversely, your 190 is not suitable for defense 170, and your speed flexibility is not good. Finally, there are technical problems. Under the same physical conditions, defensive skills and experience are decisive factors. For the personal defense from 1 to 1, I think the best policy is not to shoot when it is time to shoot. After all, the shooting percentage can't compare with the blue one last time. Of course, if you are a defensive pitcher, you must press close to your body. Let's talk about high defense first: bend your knees, keep the angle between your thighs and the ground at 0-30 degrees as far as possible (that is, lower your center of gravity), your feet are slightly wider than your shoulders, your upper body leans forward slightly, your arms are open, your palms are opposite, one arm is slightly higher to interfere with the opponent's passing, and the other arm is slightly lower to interfere with the opponent's ball control, depending on your habits and the opponent's specific attack. When the other party moves, it slides with the moving direction. Which direction is the sliding step? Take one foot first and then the other (don't blame me for being wordy, some beginners often make mistakes). Unless it's personal defense, the general defensive posture is that the opponent faces the basket, slightly leaning in the direction you think the opponent may pass the ball. The most important thing to practice defense is to practice your steps (mainly sliding), so that you can intercept the opponent's attack and passing route in time and minimize the influence of the opponent's fake action on you. One way to practice is to slide left and right along the zigzag route on the court with the posture I introduced first, and the upper limbs must maintain the correct posture. Another practice method is to slide left and right (usually two or three steps are enough) to the left and right sideline of the restricted area, lean over and touch the sideline of the restricted area with both hands, and then slide to the other end, and the same is true. The former can help you maintain the correct defensive posture, while the latter can help you strengthen your physical coordination when you are in steals the ball or interfere with the opponent's attack. The other is the broken step, in which the body still maintains the correct defensive posture, and the feet alternately jump up and down in small steps, or let the basketball roll slowly on the ground and then follow the basketball in small steps. This exercise method can enhance your leg strength and leg reaction speed. Either way, you must put in a lot of practice to get obvious results. Practice until you can't move your legs every time. Talk about the inside defense skills. In some of my technical and tactical posts, I started with defense and specialized in interior defense, but my height is only 175CM and my weight is 60KG. My height is not dominant, my weight is average, and I belong to the small man in the basketball court. However, I am confident to stand inside, and my opponents are basically above 185CM, but I basically don't suffer from attack and defense or rebounding. Let's talk about some inside defense skills.