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What age does wear and tear start and how to slow it?

While the wear and tear theory of aging suggests damage accumulates over a lifetime, significant changes often begin earlier than you might think. A 2019 survey found that people report noticing noticeable signs of bodily deterioration and wear and tear, such as creaking joints and back pain, around their late 30s and 40s. Understanding this timeline is the first step toward proactive healthy aging.