A technique used in cardiopulmonary rehabilitation during which the patient is instructed to walk around two cones set 9 m. apart, adjusting the step speed in time with auditory signals with progressively increasing frequency. Each lap (i.e., shuttle) is approximately 10 m. The patient walks until breathlessness sets in or is unable to keep up with the pace of the signals. The walk distance achieved is used to prescribe exercise intensity for patients.
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Examples: glitazone, GI cocktail, etc.