Key result
Critical power was significantly lower in chronic heart failure patients (80 ± 21 W) compared to untrained (129 ± 17 W) and trained (199 ± 35 W) normal subjects (P < 0.005).
Why the study?
What is the critical power (upper intensity limit for prolonged aerobic exercise) in patients with chronic heart failure compared to normal subjects?
Population
25 subjects total: 15 untrained chronic heart failure patients, 5 age-matched untrained normal subjects, and…
Comparison
Cardiopulmonary exercise testing to determine… vs Age-matched untrained normal subjects and…
Design
Cross-sectional
Authors
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CP at ~65% peak power may inform safe aerobic training zones in CHF; leaves open prospective outcome trials.
Observational (n=25)
What is the critical power (upper intensity limit for prolonged aerobic exercise) in patients with chronic heart failure compared to normal subjects?
Absolute Event Rate: 80% vs 129%
p-value: p=< 0.005
The upper intensity limit for prolonged aerobic exercise (critical power) in chronic heart failure patients is approximately 65% of peak power, providing a physiological reference for aerobic training prescription.
Mezzani et al. (2010) conducted an observational in Chronic heart failure (n=25). Chronic heart failure vs. Untrained and trained normal subjects was evaluated on Critical power (CP) (p=< 0.005). Critical power was significantly lower in chronic heart failure patients (80 ± 21 W) compared to untrained (129 ± 17 W) and trained (199 ± 35 W) normal subjects (P < 0.005).
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