"People are always like, 'Oh, you've got muscles, therefore you must be fit.' I can tell you, for free, they're for decorative purposes at best," an influencer said in a TikTok with nearly 200,000 ...

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Muscle is a soft tissue composed of elongated cells (muscle fibres) that produce force and motion through contraction. Involuntary cardiac and smooth muscles are responsible for contraction of the ...