Why Cardio-Respiratory Fitness is Important

Why Cardio-respiratory Fitness is Important

The American Heart Association (AHA) has published a Scientific Statement (Circulation 2016; 134:e653-e699) “Importance of Assessing Cardio-respiratory Fitness in Clinical Practice: A Case for Fitness as a Clinical Vital Sign”

This Scientific Statement included a comprehensive review of the body of research studies of Cardio-respiratory Fitness as a health measure and care guideline.  The Scientific Statement included the following research findings and conclusions regarding the importance of Cardio-respiratory Fitness to health and to the practice of medicine:

  • The past 2 decades have seen an exponential growth in the number of Studies assessing the association between measures of Cardio-respiratory Fitness, mortality and other health outcomes.

  • In a growing number of studies, Cardio-respiratory Fitness has been demonstrated to be a more powerful predictor of mortality risk than traditional risk factors such as hypertension, smoking, obesity, high cholesterol, and type 2 diabetes.

  • Low measures of Cardio-respiratory Fitness in adults is associated with high risk for mortality.

  • Small increases in Cardio-respiratory Fitness are associated with considerably lower risk of an adverse cardiovascular event.

  • Cardio-respiratory Fitness is a variable that is responsive to therapy.  Individuals whose Cardio-respiratory Fitness increases between examinations have a lower risk of adverse health and clinical outcomes.

  • Of crucial importance is the repeated observation that one does not need to be highly fit to gain benefit from improvement in Cardio-respiratory Fitness.

  • Physical activity interventions targeting the least fit individuals will likely have the largest health benefit.

  • Non-exercise algorithms using readily available clinical variables may provide reasonably accurate estimates of Cardio-respiratory Fitness as compared with Cardio-respiratory Fitness Exercise (CRX) tests.

  • Non-exercise estimates of Cardio-respiratory Fitness may be useful to provide an initial estimate of an individual’s Cardio-respiratory Fitness, particularly to identify those at increased risk of disease because of a low Cardio-respiratory Fitness measure.

  • The evidence reviewed suggests that the measurement of Cardio-respiratory Fitness improves patient management and that its omission from routine clinical practice for the vast majority of patients is unacceptable.

  • At a minimum, all adults should have Cardio-respiratory Fitness estimated each year using a non-exercise algorithm during their annual healthcare examination.

A highlighted copy of the AHA Scientific Statement can be viewed via the following link:

AHA-Importance of CRF-Dec2016-highlighted