Unstable Surface Training (UST) has moved from being used almost exclusively in rehabilitation to becoming common place among personal trainers and strength coaches. One can’t go to a gym and not see somebody training on a Bosu ball, stability ball, wobble board or foam pad. It’s so popular entire books have been written on this type of training. But do not be fooled by its popularity.

UST is not popular because it works, but because of a tremendous media campaign. The fitness industry is always looking for something new. They know here’s huge money in marketing a piece of equipment and/or workout program.

Performing exercises on unstable equipment can be challenging no doubt, but research has not shown that the type of balance, and core stability developed through UST will transfer to any sports skill. Performing exercises on unstable equipment will make an individual proficient at performing resistance exercises on unstable surfaces but will not improve sports performance. Is UST training even necessary?

Researchers from Appalachian State University compared trunk muscle activity during stability ball and free weight exercises. The stability ball exercises utilized were the quadruped, pelvic thrust and ball back extensions. The free weight exercises were the squat (SQ) and deadlift (DL). During all exercises muscle activity was collected using electromyography (EMG).

During the study trunk muscle activity during SQ and DL’s was equal to or greater than which was produced during stability ball exercises. This was true even when 50% of the 1 rep max was used during SQ and DL. The role of UST is again shown to be in question.
(Journal of Strength Conditioning Research 22:95-101,2008)

Like the squat, the deadlift involves the largest muscle groups in the body: the gluteus maximus, hamstrings, quadriceps and erector spinea. And like the squat, it is a very hard, taxing exercise to perform. Consequently, for this reason alone many people don’t use the deadlift in their routines.

The gluteus maximus is utilized most in the beginning of the movement when there is a large degree of hip flexion. The glutes work in unison with the hamstring to extend the hips. The hamstrings, located on the back of the upper thigh, become more involved as you begin to decrease the degree of hip flexion as you raise the weight. The erector spinea, which run the length of your spine on both sides, are statically contracted throughout most of the movement keeping the normal curvature of the spine. A static contraction of the rhomboids and the trapezius muscles help maintain the shoulders. The quadriceps muscles are involved with knee extension.

Extension of the body occurs when the upper body, torso and pelvis rotate up and back. In a properly performed deadlift, this will happen simultaneously with the hips moving forward and the knees extending. Two of the biggest mistakes I see when this movement is performed are locking the knees out before the upper body is extended or allowing the back to “round” and magnifying the kyphotic (upper back) curvature while de-emphasizing the lordotic (lower back) curvature. I need to add that a slight curve of the upper back will present no danger and will happen to most while using heavy weight, but if you look like the hunch back of Notre Dame while performing the exercise that’s a different story.

The main reason your lower back would round, which could cause devastating trauma to the lumbar area, is weak erector muscles. There are various exercises you can use to strengthen your lower back like good mornings, arched back good mornings, arched back stiff legged deadlifts, and reverse hyperextensions, but good mornings and its variation in my opinion are probably the best exercise for this purpose.      

The Dead lift