Scientists have done study after study has shown correlations between physical activity, muscular health and mental acuity. Unfortunately, these studies have limitations because one person may be more blessed than another. They could be smarter or grew up in a better environment than the next person. That’s why twins make such good study subjects even if they are not identical they still grew up in the same environment and if they are identical twins that means the share the same genes. If one twins body, brain and thinking abilities begin to differ substantially over the years from the other, the cause is not likely to solely genetic or the early environment. Claire Stevens, a senior lecturer in twin research at King’s College London, consider twins and their thighs. Muscular power in the legs, which are the largest muscles in the body, is a sign of healthy aging. People with stronger legs tend to have sharper minds, studies show. The scientist pulled records for 162 healthy, middle-aged, female twin pairs. The twins were both identical and fraternal. The scientist took twins for had completed extensive computerized examinations of their memory and thinking abilities, as well as assessments of their metabolic health and leg-muscle power ten years prior. The twins were then asked to visit the laboratory to repeat the cognitive test. The scientist found that of the 324 twins, those who had had the sturdiest legs ten years ago showed the least change in thinking skills even with other factors such as fatty diets, high blood pressure and shaky blood-sugar control. This study showed snapshots of the brain for identical twins, if one genetically identical twin had sturdier legs than the other, she displayed significantly more brain volume and less empty spots. This study only showed a single snapshot of the brain health of middle-aged female twins.
I can't wait to read more on this kind of studies. I'm wondering if the reasons i started getting good grades is because i started lifting more weights. Defiantly something to think about.