In my opinion, the muscles trained by lifting steel bars on the construction site are somewhat similar to street fitness, which directly refers to lifting iron in the gym. Although both of them are exercises, they focus on different goals, such as lifting steel bars on the construction site, and pay more attention to local development, such as arms and back. However, starting from the gym, the coordinated development of our whole body, especially the legs and chest, will be different from the lifting of steel bars on the construction site, focusing more on muscle gain, so it will be faster than the training outside.

Secondly, because lifting steel bars on the construction site is similar to street fitness, they pay more attention to the core exercise, that is, waist and abdomen strength will be stronger and muscle endurance will be higher. Because a worker may have to lift steel bars for several hours a day, which includes various bending actions. In the gym, the core strength will be much worse, and it is impossible to make some Russian stand-up or flag movements.

Finally, each has its own advantages. I can't say who is better. Everyone pursues different things. I watched a program before, in which there was a young man on the construction site. After moving bricks, he exercised, and he also developed a good muscle and could do all kinds of difficult movements. So as long as you are willing to practice, it is the same everywhere.