"...emphasize the lowering of the weights... This helps strengthen the inverse muscle, your triceps for arm curls, and improves your overall control."
Not true. Lowering the weight works the same muscle as lifting it.
Not true. Lowering the weight works the same muscle as lifting it.
This is a really big error, and I don't see how it could be a typo. Agonist ("doer") and antagonist (opposing) muscles contract simultaneously when stabilizing a joint, but when lifting weights, the antagonists of the primary action (triceps and to some extent anconeus for curls) are relaxed both during concentric and eccentric contraction of the agonists (biceps, brachialis, and to some extent brachioradialis and a few other muscles of the forearm for curls). That is to say, the author's claim is absolutely wrong.
http://en.wikipedia.org/wiki/Muscle_contraction#Eccentric_co...
Besides it feels so good to just put some crazy amount on Scott's bench ask somebody to help you lift it and then just try to put it down as slowly as possible :)