COPD patients breathe more easily in a partially upright to upright position. In a flat or semi-recumbent position, the diaphragm is pushed upward by abdominal contents and the lung bases are compressed — reducing the effective breathing volume. The forward-leaning or slightly reclined-but-upright positions used by many COPD patients instinctively are supported by a riser recliner's ability to maintain any angle between fully upright and reclined. The ability to find and maintain the specific angle that is most comfortable for breathing matters — and a riser chair provides this in a way that a standard armchair cannot.

For moderate-to-severe COPD, the physical exertion of rising from a chair is a significant trigger for breathlessness. The Valsalva manoeuvre naturally performed during straining to stand (closing the airway and bearing down) is particularly problematic for COPD patients as it reduces venous return and increases breathlessness. A riser chair's powered rise eliminates the straining component almost entirely — the person is lifted toward standing with minimal physical effort, significantly reducing the breathlessness associated with getting up from seated.

Some COPD patients with severe disease find it easier to sleep in a riser recliner chair rather than a flat bed because the chair allows a consistently elevated resting position. For people whose breathlessness prevents comfortable sleep lying flat, a chair with a flat or near-flat recline combined with a firm footrest provides a sleeping position that maintains the head and chest elevation that aids breathing. A full flat recline is less useful for COPD than a maintained partial recline.

COPD is a qualifying chronic condition under HMRC Notice 701/7. Zero VAT applies to riser recliner chair purchases. On a £1,500 chair this saves £300. Self-declare eligibility at the time of purchase — no medical documentation is required.