WTF !!
I did this last week, 3-4 lights sets just to try. that's all I did for hams.
I have never been this sore in my entire life. Usually, just a portin of my hams is sore, now it was the entire hamstrings that were sore from the inside to the outside.
yesterday I did some real sets with two 100lbs dumbells, it was awesome
You guys should all try them