ACTIVITIES PHYSICS. EXPERIMENT ON TWINS

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Abandon a fitness regimen can cause negative changes in both body and brain.

M. Rottensteiner, of the University of Jyvaskyla (Finland), and colleagues evaluated 10 pairs of identical male twins. Each pair of twins was 35 years old and each had been brought up with the same principles. As identical twins, they shared the same DNA. The only difference was if they had maintained the same level of physical activity for most of their life or less; on average, the more active twin has been training at least twice a week, while the less active twin has been training less than two times a week.

The researchers conducted extensive measures of body composition, glucose and insulin, and MRI scans of the brain. The twins most active had a lower percentage of body fat (20.7 versus 24), improved levels of resistance, and normal insulin sensitivity; twins sedentary instead had on average about 7 more pounds of body fat, a worse resistance and insulin sensitivity, with early signs of metabolic disease. Perhaps more importantly, the team observed that the twins Athletic had more gray matter - in particular in the areas that control balance and motor function.

The study's authors argue that: "Among healthy adults, a higher level of physical activity is associated with an improvement of glucose homeostasis, modulation of the striatum and prefrontal cortex, greater volume of gray matter, regardless of genetic background."

Source: Worldhealth

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