Symptom-limited exercise testing commonly is performed on entry into cardiac rehabilitation (CR) after a major cardiac event. During this evaluation, maximal exercise aerobic capacity (peak V̇o2) is frequently measured directly, although it is more commonly estimated indirectly from the maximal treadmill workload. Peak V̇o2 carries important prognostic information for patients with coronary heart disease and chronic heart failure.1–5 It also is used to help formulate a safe, effective, and individualized exercise prescription in CR and to guide return to work and daily activity recommendations. However, despite the almost universal performance of a stress test preceding CR, normative values for peak V̇o2 on the treadmill in patients with newly diagnosed coronary heart disease have not been established. The determination of normative values for this group of patients is of value beyond the prediction of prognosis; it allows assessment of clinical status of the individual patient compared with peers, leads to the formulation of realistic clinical goals, may provide motivation for patients to participate in CR exercise training, and allows benchmarking of the fitness of patients entering CR compared with established norms. Thus, the primary goals of this study are 2-fold: to establish normative values of peak V̇o2 for patients entering CR stratified by age, gender, and diagnosis and to create nomograms to allow conversion of measured or estimated peak V̇o2 data for an individual patient to a percentage of predicted exercise capacity. We also provide data on the exercise training response in a subset of these patients.