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In the early 1960s, Balke developed a simple test to evaluate the functional capacity by measuring the distance walked during a defined period of time ( 5). Objective measurements are usually better than self-reports.
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Other professional organizations have published standards for cardiac stress testing ( 3, 4).Īssessment of functional capacity has traditionally been done by merely asking patients the following: “How many flights of stairs can you climb or how many blocks can you walk?” However, patients vary in their recollection and may report overestimations or underestimations of their true functional capacity. The most popular clinical exercise tests in order of increasing complexity are stair climbing, a 6MWT, a shuttle-walk test, detection of exercise-induced asthma, a cardiac stress test (e.g., Bruce protocol), and a cardiopulmonary exercise test ( 1, 2). The modality used should be chosen based on the clinical question to be addressed and on available resources. Some provide a very complete assessment of all systems involved in exercise performance (high tech), whereas others provide basic information but are low tech and are simpler to perform. There are several modalities available for the objective evaluation of functional exercise capacity. The committee recommends that these guidelines be reviewed in five years and in the meantime encourages further research in areas of controversy. The final recommendations represent a consensus of the committee. The guidelines follow previously published methods as closely as possible and provide a rationale for each specific recommendation. Each draft responded to comments from the working committee.
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and R.J.Z.) and were based on a comprehensive Medline literature search from 1970 through 2001, augmented by suggestions from other committee members. Drafts were prepared by two members (P.L.E. We do not discuss the general topic of clinical exercise testing.Īs with other American Thoracic Society statements on pulmonary function testing, these guidelines come out of a consensus conference. These recommendations are not intended to limit the use of alternative protocols for research studies. Specifically, it reviews indications, details factors that influence results, presents a brief step-by-step protocol, outlines safety measures, describes proper patient preparation and procedures, and offers guidelines for clinical interpretation of results. This statement provides practical guidelines for the 6-minute walk test (6MWT).