Muscle-building training - Why is it best to have 8-12 sessions per group?

Often listen to experienced fitness experts saying that if you want to gain muscle, it is best to train at 8-12RM (a medium weight that can only be repeated 8-12 times)! This will be more useful?

　　Note: 8--12RM: a medium weight that can only be repeated 8-12 times

　　But why is this division made? Why is it not 5rm Or 20rm?

　　Let's take a look!

　　The biggest purpose of bodybuilding training is not to lift a larger weight or practice more times, but to make the muscles get the greatest congestion (that is, pumping).

　　Skeletal muscle is the only muscle among the three muscles in the human body that can be actively contracted through nerves. Therefore, talents can make skeletal muscles stronger and more beautiful through active exercise.

　　The significance of congestion for muscles is: to allow more blood to enter the muscles, and to expand the muscles during training and lighten the size. Micro-tearing brings more nutrients to the expanded muscles after training, and rebuilds the tearing site, thereby thickening the muscle fibers in the area.

　　What I told at the beginning of my contact with fitness was not "to use all the ways to get the greatest congestion during training", but "the thicker the muscle fibers, the greater the strength of contraction". This theory is certainly correct, but at that time, without much experience and foundation, I understood it one-sidedly as "the larger the weight used in training, the larger the size will become".

(Note: Follow the WeChat public platform of the fitness bar, and search for subscription accounts. "Fitness Bar Network" or "Click to scan and follow")

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