Uh-oh. They advocate KOPS. We all "know" that isn't "right."
"To achieve the most comfortable riding position and powerful pedal stroke, your kneecap should be directly above your pedal crank when the crank is in its level (most forward) position.
With your bike securely in its stand, carefully climb on.
With your pedals level with each other, look down over your front knee. It should be directly above the crank of your pedal (which is approximately in line with the ball of your foot).
If you have a plumb bob, have someone hold the string to your kneecap. The bob should hang directly over the pedal crank.
• If your knee is ahead of the pedal, then loosen the seat mount and slide the seat and rails backward.
• If your knee is behind the pedal, then slide the seat slightly forward."