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Why is exercise good for you? Scientists are finding answers in our cells

In 2020, Snyder and his colleagues took blood samples from 36 people aged between 40 and 75 years old before, during and at various time intervals after the volunteers ran on a treadmill. The team used multiomic profiling to measure more than 17,000 molecules, more than half of which showed significant changes after exercise9. They also found that exercise triggered an elaborate ‘choreography’ of biological processes such as energy metabolism, oxidative stress and inflammation.