A number of recent studies have implied that using free weights is probably a better option than using machines (cables), this is probably due to the fact that you have to engage your abdominal core muscles in anticipation of lifting and handling weights.
Researchers at the University of South Carolina confirmed this and showed men who trained with free weights had a lower incidence of back pain than their machine using comrades.
I must confess to being a free weights fan but like everything, to avoid injury they must be used properly. Lifting anything poorly can potentially do damage to the spine.
For advice regarding your programme give us a call on 93844237 or come and see us for an advisory session.