Broadly speaking, it is absolutely "useful" to lift heavy objects in the air, which is conducive to the growth of arm strength and explosive power. But you can't compare it with breaking a tire, to be honest. Everyone's physical quality is different. The same abortion, people with different constitutions get different results.

In fact, the most important thing for self-learners is scientific and effective learning methods. I emphasize "rest and recuperation, step by step" Whether it is boxing or other body skills, it is difficult for self-learners to grasp the training level. Injuries to bones and muscles are common. Without a good teacher or partner, it is likely to cause lifelong regret if it is not handled in time.

We often see how good some people are at kung fu, but we really don't see how many people miss their favorite fighting and sports career because of their disabilities.

Therefore, some common practice methods in the industry are often more effective methods, which are the experience summary of many people. Self-learners should still focus on this kind of exercise.

I hope it helps you.