You said that the positive breakthrough is your problem ~ ~ and the basic skills of basketball are good ~ ~ That should explain two problems.
First, you may have poor physical coordination and can't control your body when you make a frontal breakthrough.
Second, your physical resistance is poor. When you have physical contact with the defender, you can't guarantee the integrity of your technical movements.
I'll give you a suggestion on these two questions ~ ~ ~
You can solve the problem of poor physical coordination by swimming and skipping rope. It's cool summer now, so you can spare more than an hour to swim every day. If you can't swim, it's best ~ When you learn it, your physical coordination will be greatly improved. Skipping rope should be persistent, not simply jumping with both feet, but jumping with both left and right feet.
Some people above are right about the lack of physical resistance.
Push-ups: you can try to do push-ups with narrow arms, with your hands on the ground, and the distance between your hands is shoulder width. When you get down, your arms should be tightly clamped to your body, that is to say, your elbows should be bent backwards. This push-up works well, but you may not be able to do any at first, just stick to it. Don't think about how much to do at a time, but set a goal, such as 100, finish it ten times, and try to finish it eight times tomorrow. This is upper limb strength training.
Waist and abdominal strength training: put a weight on your shoulders (preferably a barbell if possible), then spread your legs, keep your feet shoulder width apart, keep your lower body upright, bend over and get up again. Do this action repeatedly. The weight on your shoulders can keep rising with your feelings.
Frog jump: There is one above that makes it very clear. . .
I also have a wonderful trick to improve the bounce ~ ~
Grab a 5 kg or 10 kg barbell piece with your left hand (other weights are acceptable, as long as it is convenient to take it), stand on the front basketball stand within the three-point line, adjust the distance between the three-point line and the basketball stand and touch the basket in three steps. Be sure to use the three-step layup action, whether you can touch the basket or not, try to touch it in the direction of the basket every time, return to the three-point line after coming down, and touch each group with your right hand at three points.
This is very useful. My college coach taught me that this training improved my jumping by more than 20 centimeters, but at that time I was still young, only 16 years old, and my body was not fully mature. And you are eighteen years old. Although you may not make as much progress as I do, you will always make great progress ~ ~ ~
You said you were in poor health and there was no good way. You go to play basketball early in the morning and run, and insist on running training for at least 3 kilometers every day. There is a good saying, "Track and field is the mother of sports."
Say so much first, and then add it when you think about it. My QQ number is 32338965. If you don't understand anything, you can add me ~ ~ ~
We have the same hobby, and I believe there will be * * * with the same language ~
In view of your physical condition such as height, I personally suggest that you practice one-handed jump shot and one-handed jump shot with three points, because if you shoot too accurately, the defender will definitely not dare to be too far away from you. The closer you are, the smaller, faster and smarter you will be. If he is far away from you, shoot him to death ~ ~ ~