Many people can't pull up because they don't have enough strength. In addition, they may have the wrong way to force. If you want to pull up, you should correctly use the strength of the arm and back muscles, tighten the core, and then supplement it with enough strength to succeed.
Many people can't pull up. First of all, it may be because the relative strength is not enough, which means that the strength we can use can't pull us down in this posture.
In addition, many people think that pulling up is just using the strength of their arms, which is also the reason why many people fail to pull up, because if the way of force is wrong, even if the strength is enough, they may not be able to pull up.
When doing pull-up, we should learn to use the strength of the back muscles, and then tighten the core muscles. It is best not to relax the whole body. On this premise, it is easier to use the muscles of the arm and back to pull-up.