The case for positional therapy
For a meaningful share of adult patients — roughly one in four — obstructive events occur disproportionately while sleeping on the back. We call this "supine-predominant" or "positional" sleep apnea. For these patients, simply staying off the back during sleep can resolve a large fraction of events.
Who qualifies
Positional therapy is appropriate when the polysomnogram shows:
- A supine AHI at least twice the non-supine AHI
- Non-supine AHI below the clinical treatment threshold (typically < 5)
- No anatomic finding that would call for primary CPAP
- Patient ability to tolerate side or prone sleeping
For patients whose events occur in any position, positional therapy may complement other treatment but is not a replacement.
Approaches we use
Vibratory positional device
A small chest- or neck-worn device gently vibrates when it detects supine position. Training-based; most patients stop rolling onto the back within four to six weeks.
Body-pillow training
A long lateral pillow or body cushion makes side sleeping more comfortable and discourages supine rotation. Low-tech and well-tolerated.
Tennis-ball technique
A simple, time-tested method: a soft object sewn to the back of a sleep shirt makes supine sleeping uncomfortable. Useful as a low-cost trial.
Bed-frame adjustments
An adjustable bed frame with elevated head can reduce supine events in some patients, particularly those with reflux or mild positional snoring.
Outcomes we expect
For appropriately selected patients, positional therapy reduces the apnea-hypopnea index by 40 to 60 percent on average. We verify outcomes with a repeat polysomnogram while using the chosen positional approach.
What positional therapy does not address
- Severe sleep apnea (AHI ≥ 30) — CPAP is preferred
- REM-dominant events — events that occur during REM regardless of position
- Significant nasal obstruction (separately treatable)
- Weight-related airway loading (lifestyle work supports any treatment)
Long-term adherence
Unlike CPAP, positional therapy does not require nightly device use after the training phase — most patients internalize side-sleeping within six to eight weeks. We reassess annually with a repeat sleep study to confirm sustained benefit.
Combination with other treatments
Positional therapy frequently combines well with oral appliances and with weight management. For patients on CPAP who would prefer to use the device only on certain nights or during travel, positional therapy can provide a meaningful safety floor.
The simplest effective treatment is the one you should consider first — provided it actually addresses your specific pattern of events. — Seoul Sleep Center clinical principle