we disentangle the true from the false

we disentangle the true from the false
we disentangle the true from the false

Our body has more than 600 muscles, which can be classified into two main types: skeletal muscles, representing 40% of our body mass, and smooth muscles, located on the walls of blood vessels and certain organs (bronchi). , uterus, intestine). Among the first, we distinguish those of red or pink color with slow contraction (jaws, diaphragm, etc.) and the white ones, with rapid contraction (biceps, etc.). These nuances are explained by their richness in myoglobin, a protein containing iron. Finally, the heart is also a muscle, with a particular functioning.

Fake. For a long time, they were of interest to medicine only for their mechanical properties. However, they have many other roles: they store energy reserves, participate in maintaining body temperature and regulating lipid levels. Furthermore, research is progressing on myokines, small proteins released by the muscle when it contracts. They contribute to important functions, including limiting excess weight, resistance to diabetes and the production of brain cells.

Fake. “We all have abs, even if we don’t always see them!” replies Dominique Dardevet, deputy director of the human nutrition unit at INRAE ​​(National Research Institute for Agriculture, Food and the Environment). They sometimes hide under a layer of fatty tissue. “Muscles have a variable volume and strength depending on the individual. (…)

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