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the life experiences of grandparents and even great-grandparents alter their eggs and sperm so indelibly that the change is passed on to their children, grandchildren, and beyond. It’s called transgenerational epigenetic inheritance

the phenomenon in which something in the environment alters the health not only of the individual exposed to it, but also of that individual’s descendants.

Other labs, too, are finding that experiences—everything from a lab animal being exposed to a toxic chemical to a person smoking, being malnourished in childhood, or overeating—leaves an imprint on eggs or sperm, an imprint so tenacious that it affects not only those individuals’ children but their grandchildren as well.

Emphasising the emotional benefits of exercise is more effective at increasing levels of physical activity than highlighting traditional health benefits. This is the finding of research published online today, 17th February 2010, in the British Journal of Health Psychology.

Some teens received text messages that highlighted either the emotional benefits of exercise - such as 'Physical activity can make you feel cheerful. What activity will you do today?' , a second group received texts that highlighted the physical benefits, such as - 'Physical activity can keep your heart healthy. What activity will you do today?'