Q is the quality factor, not the resonant frequency. It's the ratio of stored to dissipated energy, in other words the amount of "amplification" you can achieve

Q is the quality factor, not the resonant frequency. It's the ratio of stored to dissipated energy, in other words the amount of "amplification" you can achieve by stimulating at the resonant frequency as opposed to the non-resonant frequency. It's never infinite unless you have a system whose oscillations dissipate no energy. In "squishy" systems Q tends to be rather low, and the effects of resonance rather muted. I would expect humans to have a low Q.