What's the problem? What is the relationship between muscle size and strength? I will look at the factors that affect muscle strength with readers. It is generally believed that the strength of muscle is indeed related to the size of muscle, that is, it is directly proportional to the cross-sectional product of muscle. The bigger the muscle, the more contractile protein it contains, and the greater the power it produces. This is the reason why weightlifters and muscular men are muscular, because both of them need to lift various weights frequently in training or competition, or carry out resistance training. All skeletal muscles in human body are composed of muscle fibers, and many muscle fibers together form muscle bundles. Strength training will lead to the thickening of muscle fibers and the increase of muscle fibers, thus making muscles bigger.
ATP (adenosine triphosphate) is an unstable high-energy compound, which is the driving force of our life and is responsible for the transfer of almost all chemical energy in cells. Muscle can't live without ATP, which is the basis of transforming chemical energy into kinetic energy. In other words, muscle contraction is powered by ATP. So ATP is equivalent to the "energy block" of muscle. People who have been training for a long time, such as the weightlifters and muscle men mentioned above, can improve their intracellular ATP reserves, so their muscles have more "energy blocks" that can be used immediately when they contract. Finally, the external performance is that the muscles are stronger and faster.
The purpose of porters or brick movers is to complete tasks as quickly as possible, so they must save energy. In the process of carrying heavy objects, it is more efficient and labor-saving to use the whole body to complete the carrying work as much as possible. In the words of bodybuilders, it is necessary to use the role of "compensation" more. For example, when carrying heavy objects, if the strength of both arms is not enough, then try to make the heavy objects lean against the crotch, and let more weight be borne directly by the lower limbs through the moderate reclining of the upper body. However, the training method of muscular men is just the opposite, emphasizing training the target muscles in isolation and trying to avoid or reduce the occurrence of "compensation". In other words, resistance training should be carried out in the most laborious way, and only in this way can the target muscles become thicker and bigger. Therefore, in the way of carrying heavy objects, manual workers habitually use the whole body's strength, but muscular men are not good at this way at all, although muscular men win more from the muscle strength of a single part.
The particularity of training leads to the advantages of muscular men and manual workers. Among the fitness principles, there is also an important "specialization principle", that is, what kind of exercise effect you want, you have to carry out special targeted training. To put it bluntly, practice running if you want to run fast. Practicing swimming may be helpful to running, but it will not have a substantial impact. Muscular men's well-developed muscles are the result of long-term systematic overall strength training, not for sports or brick moving, so it is normal for muscular men not to be good at sports or brick moving. On the contrary, it is not good for manual workers to do bench presses or pull-ups.