The best position for side sleepers on an adjustable bed is one that supports the spine and relieves pressure points. To find the best position, adjust the head of the bed, elevate the legs, experiment with different angles. Some people may prefer a slight incline, while others may prefer a more upright position. Ultimately, the best position for side sleepers on an adjustable bed is one that is comfortable and provides the support and alignment your body needs to rest well.