The standing desk arrived in many offices on the strength of a claim that sitting all day is dangerous, but the research since has complicated the simple version of that story. Standing all day brings its own problems, including strain on the lower back and swelling in the legs from blood pooling. What the evidence more consistently supports is that alternating between sitting and standing throughout the day, and simply moving more often regardless of posture, matters more than which position a person defaults to. A desk that only allows standing has, on this view, traded one static posture for another rather than solving the underlying problem.