: A primary driver is the loss of muscle mass, known as sarcopenia. In the hand, this is most visible in the thenar muscle group —the fleshy pad at the base of the thumb. After age 60, hand-grip strength can decline by up to 25%, often accompanied by a visible "hollowing out" of this muscle area.
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: Some individuals may have naturally longer or thinner thumbs due to conditions like triphalangeal thumb (where the thumb has three bones instead of two) or connective tissue disorders like Marfan syndrome , which causes long, slender digits. : A primary driver is the loss of
While aging is inevitable, there are ways to preserve hand function and volume: This is for informational purposes only
: Targeted exercises can help maintain the thenar muscles. Using a soft stress ball or practicing "thumb-to-finger" touches can keep the intrinsic muscles active.