John is a 72 year old male who presents with a 4 month history of chest tightness and shortness of breath on exertion, both of which are relieved with rest. There is no chest pain at rest. On examination, blood pressure is 153/92 with a resting pulse of 87 bpm. He has no overt signs of heart failure. John is a current smoker (20 cigarettes a day for the past 30 years) and consumes around 4 units of alcohol a week. He is known to have Type 2 Diabetes and is on Metformin and Gliclazide.
He is suspected to have stable angina and is referred to the Rapid Access Chest Pain clinic to confirm his diagnosis. What is the least appropriate next step in his management whilst he awaits his appointment with Cardiology?