The Selection of Exercise Testing Protocols in Cardiovascular Rehabilitation Centres: A Pan-Canadian Survey.

BACKGROUND

Cardiorespiratory fitness (CRF) is a strong independent predictor of mortality and is routinely assessed in cardiovascular rehabilitation (CR) using exercise tests. Several protocols for measuring CRF are available, but their selection in CR centres and the decision-making processes guiding these choices remain unclear. This study aimed to identify (i) the most frequently used maximal and submaximal exercise testing protocols in Canadian CR centres, and (ii) the number of protocols used, annual testing volumes, decision-makers, and criteria guiding protocol selection.

METHODS

This observational pan-Canadian survey was distributed electronically to all identified CR centres to capture their exercise testing practices, annual testing volumes, protocol frequency, and decision-making criteria.

RESULTS

Of 196 centres identified and contacted, 118 completed the survey. Among these, 87 centres (74%) performed exercise testing: 15% used only maximal tests, 47% used only submaximal tests, and 30% used both. The Bruce treadmill protocol was the most used maximal test (86%), and the 6-minute walk test was the most used submaximal test (77%). Approximately 5,575 maximal and 20,105 submaximal tests were performed annually. Physicians were the primary decision-makers in 54% of centres, followed by exercise physiologists (38%). Common selection criteria included staff clinical judgement, patient-specific factors, and standardized centre procedures.

CONCLUSIONS

Exercise testing practices in Canadian CR centres vary widely, with submaximal protocols favoured. Although the Bruce and 6-minute walk test protocols dominate current practice, variability in their selection underscores the need for standardized guidelines that account for heterogeneity across centres and patient populations. Future research should explore outcomes associated with different protocols to optimize CRF assessment and exercise prescription.