Key result
In patients with myocardial infarction or heart failure, % heart rate reserve was equivalent to %VO2 reserve (slope 0.96 and 0.97, respectively; P=NS vs 1), but not to %VO2peak.
Why the study?
Does %HRR better estimate %VO2R than %VO2peak in patients with myocardial infarction and chronic heart failure?
Observational (n=137)
Does %HRR better estimate %VO2R than %VO2peak in patients with myocardial infarction and chronic heart failure?
Effect estimate: slope 0.96 (MI) and 0.97 (HF)
p-value: p=NS
In patients with heart disease, %HRR is a better estimate of %VO2R than %VO2peak, supporting the use of %VO2R when prescribing exercise based on VO2.
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Validates %VO2R for intensity prescription in heart disease; confirms ACSM shift from %VO2max.
Brawner et al. (2002) conducted an observational in Myocardial infarction and chronic heart failure (n=137). % heart rate reserve (%HRR) vs. %VO2 reserve (%VO2R) and %VO2peak was evaluated on Slope and y-intercept of %HRR versus %VO2R compared with the line of identity (slope 0.96 (MI) and 0.97 (HF), p=NS). In patients with myocardial infarction or heart failure, % heart rate reserve was equivalent to %VO2 reserve (slope 0.96 and 0.97, respectively; P=NS vs 1), but not to %VO2peak.
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