Back injury is the largest single recorded cause of long term sick leave. Most strains and injuries to the back occur when repeating previously successful actions. In most cases, no more than 48 hours bed rest is advisable. Extended periods working in fixed positions. Highest incidence in all sedentary or all manual work.
Lowest incidence is found when tasks and activities are varied.
Poor car seating and poor driving posture. Professional drivers more likely to suffer. Lack of exercise. Sagging mattress, poorly supportive, ill-fitting sofas and armchairs. Bad lifting and carrying methods.