A 1-point decrease on a 5-point scale of perceived job control (the degree to which an employee feels free to set his or her pace or change the sequence of tasks) is associated with an additional 1 millimeter of daily spine shrinkage, a phenomenon linked to lower-back pain, according to a study of Swiss office workers by Ivana Igic and two colleagues from the University of Bern. A worker’s level of job control may affect his or her ability to take breaks when and as long as needed. On average, normal spinal shrinkage causes people to lose about 14 millimeters, or 1%, of stature over the course of a day; they recover their height during sleep.
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