Starting Strength, 3rd Edition - Mark Rippetoe [86]
Figure 4-42. The work of the deadlift is understood to include the force necessary to maintain the correct intervertebral relationships in lumbar extension, so that the pulling force all gets to the bar. If you substitute plate-to-platform rebound for the work you should be doing with your back, you are a pussy.
Another problem with bouncing your reps is that any back position problems that develop during the set cannot be addressed as effectively. If your back begins to round during the set, it tends to stay round or get worse unless you reset it, which you must do at the bottom, when the bar is sitting on the floor and your back can move into the correct position unloaded.
There are a couple of ways you can think about setting the back before starting the pull. Positional awareness has already been discussed, and for some people it is sufficient to think about arching the lower back. This is, after all, most of what setting the back is about. But really and truly, you set the entire torso before you pull, and you may find it helpful to think about it in this way – squeezing your low back and abs and chest all at the same time on a big breath, not as separate muscle groups but taken as a whole unit. This approach increases the effectiveness of the Valsalva and causes all the muscles participating in it to contract harder and provide more stability.
Looking in the right direction
Eyeball position is also often overlooked when you assume the starting position. If you look straight down at the floor when you pull, the bar will usually swing out away from your legs. It is easier to keep your chest up and your upper back tight if your eyes are focused on a point that places your neck in an anatomically neutral position; this point can be on the floor (if you’re in a big room) or on the wall facing the platform. If the floor is your gaze point, look about 12–15 feet in front of you. Looking up is not any better for the deadlift than it is for the squat, as we discussed at length in that chapter. Actually, looking straight down is not terribly detrimental to the squat, but it will make the deadlift harder most of the time. The functions of correct eye gaze direction are to keep the neck in a safe, useful position during the movement, to aid in placing the back at the correct angle