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– The submaximal exercise capacity assesses the functional capacity of the individual, which can be measured by the Six Minute Walk Test (6MWT) and by the Four Minute Step Test (4MST). Objective – To compare the cardiorrespiratory responses and perceived exertion between the 6MWT and 4MST in patients undergoing coronary artery bypass grafting (CABG) participants in a cardiac rehabilitation program. Methodology – Cross-sectional study composed of seven men (58.7 ± 9.37 years). The cardiovascular responses were analyzed (peripheral oxygen saturation – SpO2; heart rate HR; systolic blood pressure SBP; diastolic blood pressure DBP), dyspnea and lower limb (LL) fatigue were assessed by the modified Borg scale. The tests were administered in according to American Thoracic Society (ATS, 2002) guidelines. Results – Significant differences were observed (p < 0,05) in the deltas of SBP, DBP between the tests. Conclusion – Our results suggest that both the 6MWT as the 4MST estimate submaximal exercise capacity, but the 4MST requires a higher metabolic demand, observed by greater increase in blood pressure. Descriptors: Cardiovascular Diseases; Exercise Test; Fatigue; Arterial Pressure; Rehabilitation. Saúde (Santa Maria), Santa Maria, Vol. 40, n. 1, Jan./Jul, p.117-124, 2014 ISSN: 0103-4499

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RESPOSTAS CARDIORRESPIRATÓRIAS DURANTE DOIS TESTES DE EXERCÍCIO SUBMÁXIMOS EM PARTICIPANTES DE UM PROGRAMA DE REABILITAÇÃO CARDÍACA: RESULTADOS PRELIMINARES