Physical education is easier for those who have practiced it before. Scientists from Norway have just known why.
It turns out that the muscles literally remember the exerted effort even after being left to degrade.
Memory for healthy pushing is stored in the nuclei of muscle cells. When the muscle strains, the DNA from these nuclei spreads through tissues. So far, it is believed that with the atrophy of the muscles, these nuclei are lost, but this is not the case.
The produced excess cores survive and act as information banks. It allows you to quickly reach a good shape when starting a new exercise mode.
Head of the study, Christian Gundersen, of the University of Oslo, says this effect is due to the size of the muscle cells. They are too large, so they need more than one core producing DNA templates for protein production. Hence the explanation of another discovery - that in the exercises the number of the cell nuclei increases first, and then the increased muscle mass and volume is increased.
In mice, the "physical" cores survived three months after stopping the fitness program - which is almost half a lifetime for rodents. The muscles atrophied but at the expense of other cells.
The discovery suggests that children have to actively engage in sports from an early age, and that compulsory physical education classes may be among their most beneficial educational benefits.
In a new light, doping control will also have to be considered. Prohibited preparations stimulate the creation of "power cores". If it turns out that these "illegal" assistants are practically eternal, doping rule offenders should be expelled from sport forever, not for a year or two.