Electrical impedance myography detects age-related skeletal muscle atrophy in adult zebrafish.

At 1000 kHz, aged animals exhibited nominally significantly increased resistance (217.5 ± 20.5 versus 151.6 ± 12.9 ohms; p = 0.035, not FDR significant), while phase angle and reactance did not change as compared to young animals (Fig. 3 J–L).

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In aged animals, there was an overall trend toward decreased phase and increased resistance as compared to young animals, whereas reactance values were lower in aged animals at frequencies below 60 kHz and then were higher at frequencies beyond that value.

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