I would have to disagree with Coach Joe, and for the exact reasons he gives, suggest that you use a 311 time scheme.
You may have noticed that a 311 rep timing seems to be the most commonly suggested one in a great many T-Mag articles. I actually wondered about this myself for a long time, trying to figure out why that seemed to be the “best” to many of the T-Mag authors.
Then, one day while reading the T-Mag archive, I came across an article that explained it. The reason it seems more comfortable to you to drop, then explode, is because it’s easier. The reason it’s easier is because of what Coach Joe mentions, the stretch shortening cycle. What it means, to quote TC and Ian King, is:
“If the transition from eccentric to isometric to concentric is performed quickly, the resultant concentric contraction is a lot more powerful than if no eccentric action was performed.”
To show this example clearly, try squating down slowly, pausing, then jumping as high as you can. Follow that by quicking dropping into a squat, and immediately jumping as high as you can. Chances are you jumped a lot higher the second time.
The reason that a 311 tempo is suggested, is because by spending three seconds to lower the weight, then pausing for 1 second, you are losing that elastic stretch energy, and forcing your muscles to work harder to lift weight. The last 1, for the concentric motion, means that you should basically lift the weight as fast as possible. It may not actually move very fast, if you’re using a heavy weight, but the idea is to try to lift it fast.
Basically, this is less about utilizing the eccentric movement, than it is about accentuating the concentric movement. By doing this, you can place maximum tension on your muscles during the concentric lift, and if you strive to lift the weight fast, you can increase your power.
For the full details on this concept, see the article by TC and Ian King called “Four Seconds to More Productive Workouts”[1].
[1] http://t-nation.com/findArticle.do?article=body_53four