I like doing Yates Rows. http://www.stumptuous.com/badrow.html <-- Scroll down about halfway. To execute the movment, you have to start in a quarter-squat position, and this kills my legs as I'm literally just "squatting" there for 8-10 reps. Sometimes it feels like my legs are going to give out before my back does. Is this normal or am I doing something wrong?