Shoulder-out immersion in pregnant women

In the laboratory, water immersion or lower body positive pressure produces significant diuresis and natriuresis. Shoulder-out immersion appeared to induce significant diuresis and natriuresis in 42 pregnant women who were exercising in swimming pools. Lower body positive pressure (pressure calf sleeves) or Hubbard tanks (bathtubs) was not associated with increased renal function. In selected pregnant women with abnormal water distribution, shoulder-out immersion may prove to be effective therapy.