I know that Cathe uses considerably lighter weight than she normally would on this video, but why does she only use 10 lbs total for leg presses? I either match her weight or lift lighter on most of the exercises, but for leg presses, I more than double what she lifts. (Maybe it's from years of Firming with those endless leg presses.) What does everyone else lift? I feel like my form is fine; should I lift lighter for some reason of which I'm not aware?