I understand the benefit in regards to healthy weight and avoiding atrophy, but in general, the more something (inanimate) is used, the faster it will wear out. Why is this different for humans? Does it have to do with cell regeneration or turnover that is increased the more active we are?
In: Biology
Working out improves the strength of your muscles by tearing them down and rebuilding them. Being active helps with this for your entire body, replacing old cells with new, stronger ones.
Stronger cells around your body have obvious effects in combating the effects of old age. A stronger heart helps to mitigate heart disease. Stronger muscles and bones prevent muscular atrophy and osteoporosis to a certain degree. Having something to do improves your brain also which in turn makes negative changes to the brain less meaningful. e.g. the cognitive reserve hypothesis for alzheimers
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