In most cases, back sleeping is the best position for those with restless leg syndrome. When resting on your back, bodyweight stays evenly distributed so back muscles can fully relax. However, those with sleep apnea may want to avoid back sleeping, since this position can cause the tongue to fall back and obstruct breathing. If you have RLS, elevating the legs, either with a pillow or an adjustable base, can also improve circulation and reduce symptoms.