To put it simply, Zercher squats are brutally hard.
The Zercher squat—what is it? The exercise supposedly originated from, you guessed it, a man named Zercher. Ed Zercher was an American strongman active in the 1930’s and in his day was one of the strongest men in America. The story goes he had no access to a squat rack and used to pick the bar up from the ground, rest it in his arms, and squat.