In patients entering a formal cardiac rehabilitation program after PCI, treadmill exercise testing is reasonable. (Level of Evidence: C) Class III: NO BENEFIT 1. Routine periodic stress testing of asymptomatic pa- tients after PCI without specific clinical indications should not be performed.795 (Level of Evidence: C) Treadmill exercise testing before cardiac rehabilitation pro- vides information about peak exercise capacity and heart rate, helping to stratify patients for the level of supervision during training, and seems reasonable for this purpose851; nuclear imaging to assess ischemia in this context usually adds little. The role of exercise testing to evaluate restenosis is much less certain. Although the presence of symptoms may not be a reliable means of detecting restenosis, there is no evidence that the detection of silent restenosis leads to improved outcome.852,853 Routine testing of all patients after PCI will also lead to many false-positive tests, particularly in the era of DES. 