This research is based upon the
Balance Theory Model of Smith & Carayon-Sainfort [1, 2]. This model specifies that the working conditions and
other factors outside of work, can create a stress on the individual. This stress can have physiological and
psychological consequences. If the stress exceeds the individual’s capacity, the stress can produce a negative effect
on the individual which could result in a strain. This is a bad fit between the individual resources and the work
demands. If the stressful exposure continues for a prolonged time period, then this can result in serious
musculoskeletal disorders.