...
as your heart also runs at about 60Hz.
You... might want to think about that for a couple seconds.
Or see a doctor.
Hummingbird with a meth problem?
LOL!
So much for brevity. The human body "syncs" with a 60hz signal really easily, and at household voltage that can cause your heart to stop or to beat wrong. At 50 hz this effect is much less likely.
You are half right. The reality is both 50HZ and 60HZ are very hazardous to the human body. The problem is that both are harmonics of the human heatbeat range (which is roughly 1-3Hz, not 60). You'd need a much higher frequency to lessen the risk, ie: aircraft generators. Most aircraft generators run at 400Hz which is too high a frequency to affect the heart.