Circuit training in patients with chronic heart failure resulted in similar oxygen consumption and hemodynamic demand compared to continuous aerobic exercise, with lower systolic blood pressure (P<0.05).
Does combined aerobic and resistance circuit training produce similar exercise intensity and oxygen consumption compared to continuous aerobic exercise in patients with chronic heart failure?
Circuit training is well-tolerated and elicits similar oxygen and hemodynamic demands as continuous aerobic exercise in patients with chronic heart failure, with RPE being a better monitor of intensity during circuit training.
PURPOSE: This study compared the exercise intensity of a combined aerobic and resistance exercise circuit training session with the exercise intensity of continuous aerobic exercise in patients with chronic heart failure (CHF). METHODS: Peak oxygen consumption (VO2peak) and muscular strength (1 repetition maximum) were assessed in six CHF patients (age 62 +/- 3 years). Heart rate, rate of perceived exertion (RPE), blood pressures, ambulatory oxygen consumption (VO2), and ventilatory data were measured during two types of exercise: continuous cycling on a bicycle ergometer (aerobic AER session) and combined AER and resistance exercise (circuit training CIR session). RESULTS: There were no significant differences in VO2, RPE, heart rate, or hemodynamic responses (rate pressure product, diastolic blood pressure, or mean arterial pressure) during exercise, between the two sessions. Systolic blood pressure was significantly lower during CIR (P < 0.05). Minute ventilation and tidal volume were significantly higher (P < 0.0001 and P < 0.01, respectively) and respiratory frequency significantly lower (P < 0.005) during CIR. During CIR, RPE significantly correlated with VO2 (P < 0.01), whereas heart rate did not. Conversely, during the AER session HR correlated with VO2 (P < 0.01), but RPE did not. CONCLUSIONS: Circuit training is a well-tolerated form of exercise training for CHF patients that is associated with similar oxygen and hemodynamic demand to aerobic exercise. Results suggest that RPE may be a better method of prescribing and monitoring exercise intensity during CIR, with heart rate the preferred measure of intensity during aerobic exercise.
Green et al. (Tue,) conducted a other in Chronic heart failure (CHF) (n=6). Combined aerobic and resistance exercise (circuit training) vs. Continuous cycling on a bicycle ergometer (aerobic exercise) was evaluated on Ambulatory oxygen consumption (VO2), rate of perceived exertion (RPE), heart rate, and hemodynamic responses. Circuit training in patients with chronic heart failure resulted in similar oxygen consumption and hemodynamic demand compared to continuous aerobic exercise, with lower systolic blood pressure (P<0.05).