They are SHORTENED in a front squat.
"As the hip flexes, the knee flexes, thus keeping the hamstring at about the same length throughout the movement."- You on various occasions
I don't understand. How is it then that hamstrings are lengthened much more in a back squat that in a front squat if they don't lengthen on the way down, but you start out with an erect torso on both?
They are SHORTENED in a front squat.
So their length decreases because the knee flexes far more than the hip flexes? Wouldn't it therefore follow that the hamstrings will lengthen in a squat where the hip flexes more than the knee flexes?
Draw it.