Fitness: This is how exercise saves hearts, brain cells and even lives

Inner balance, mental freshness, protection against deterioration – being fit doesn’t just mean strengthening the body. But also soul and spirit.

Small, salty drops run down her forehead. It’s actually too hot to run, to let the muscles burn, to get the heart pumping. Christiane Benecke does it anyway, in the cool forest above Esslingen. She has pulled her baseball cap down over her face so that the sun doesn’t dazzle so much.

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