Key result
Standard Bruce protocol produces similar submaximal heart rates to modified Bruce in stable CAD.
Why the study?
It was unclear whether parameters used to evaluate training effects can be compared when serial exercise tests use different protocols in patients with stable coronary artery disease.
Does the standard Bruce protocol compared to the modified Bruce protocol yield different submaximal and peak physiologic responses in patients with stable coronary artery disease?
Comparison
Standard Bruce protocol vs modified Bruce protocol exercise tests
Design
Randomized crossover study with tests performed 1 hour apart
Authors
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Supports interchangeable Bruce protocols for serial submaximal assessments in stable CAD; confirms equivalence in this population.
RCT (n=32)
Random order
Does the standard Bruce protocol compared to the modified Bruce protocol yield different submaximal and peak physiologic responses in patients with stable coronary artery disease?
Absolute Event Rate: 99% vs 101%
p-value: p=NS
Submaximal exercise responses are comparable between standard and modified Bruce protocols, allowing for serial comparison to evaluate training effects, though peak V̇O2 differs slightly.
McINNIS et al. (1994) conducted an RCT in Stable coronary artery disease (n=32). Standard Bruce protocol vs. Modified Bruce protocol was evaluated on Heart rate at matched exercise stage I (bpm) (p=NS). The standard Bruce protocol produced similar submaximal heart rate responses (99 vs 101 bpm) compared to the modified Bruce protocol in patients with stable coronary artery disease.
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