At 56, Jennifer Aniston has the body many of us can only dream of – regardless of age. The Friends star always looked toned and muscular, with washboard abs and svelte arms.

Given she never looks anything short of sculpted, we've often found ourselves asking how she maintains her physique – and she has finally revealed her secret, explaining: "Muscle is the ultimate anti-ageing tool. I am building strength that fuels my energy, confidence and longevity."

Curious as to how muscle can serve as an anti-ageing tool, we spoke to personal trainer Shakira Akabusi , who explained how our muscles can keep us feeling youthful – but also shared the sobering fact that our muscles decline rapidly as we age.

© Pvolve Jennifer often displays her jaw-dropping abs

Why are muscles anti-ageing?

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