My quads were a little more sore than normal before doing Day 51’s Max Interval Plyo, but I got through the workout without a problem. Well, I should say without the quads being a problem. My right knee did hurt a little during the first and third set of squat jumps. I just tried to make sure my knees were not over my toes and that I was landing softly. I still could not do the side push ups, so I just held myself in the up position. Even doing that, I was only able to make it about halfway through that exercise.