TMT (ETT)An exercise stress test determines how well your heart responds during times when it's working its hardest. It typically involves walking on a treadmill or pedaling on a stationary bike while hooked up to an EKG to monitor your heart’s activity.A stress test is a very commonly performed test to learn:<ul style="list-style-type:circle"> How well your heart pumps blood.Whether your heart is receiving an adequate blood supply.How you perform on physical activity (riding a treadmill or stationary bike) compared with other people your age and sex.If your symptoms (chest discomfort, shortness of breath,feeling like your heart is racingor even dizziness) can be reproduced while performing physical activity.