Magnetic resonance elastography (MRE) shows significant reduction of thigh muscle stiffness in healthy older adults.

Another USE study found that resting muscle stiffness of rectus femoris was lower in older adults ( N = 10, mean age 57 years) compared with a younger group ( N = 10, mean age 27 years), but the difference did not reach statistical significance (Wang et al. 2014 ).

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