Whew... 20 lbs for front raises? I don't think I could even bring two 10 lb dumbells up to shoulder height at the same time. The absolute most I can do is 8 lbs in each hand, which is 16 lbs. I don't even use that much in Power Hour though...like already mentioned, the reps are too fast for that much weight. I use the 10 lb plate like Cathe does.