Too much of a good thing…

Electrostim is great. You crank it up as far as you can stand and it makes your muscles jump around like crazy. It stimulates your muscles into healing, helps blood flow, and is sometimes used to exercise the muscles.
Well…sometimes.
Yesterday I have two electrostim pads hooked up to each hamstring. I crank it up to as much as I can stand but something goes wrong. It causes my hamstrings to really lock up and they hurt!
I ask for the electrostim to be backed off but it’s too late. Microtears occur in my hamstrings and it wrecks today’s workout. Both hamstrings feel overworked and like they’re gonna cramp at any moment.
Another lesson learned. Too much of a good thing sometimes ain’t.