Important to train muscles
Previously the training of human muscles was automatic, since the muscle power was need to be used to stay alive. Nowadays we do not need to use our muscles on a daily basis.
Muscles being able to tract are a basic requirement for any kind of move, so they are the core organs of moving.
Our activity is gradually reduced to the movement of our body parts without strain.
The preservation of our muscles is very important because after 30 years of age 3 kg of muscle is lost.
Result: the reduction of muscle power leads to a slow atrophy of the muscle, which is strengthened after the 40 years of age.