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Checking Your Heart Rate. During many forms of exercise, it's necessary to find your pulse and count the beats to determine your heart rate. But when you use a stationary bike, the machine might be equipped with a heart-rate sensor.Before your workout, familiarize yourself with the machine's controls.uring many forms of exercise, it's necessary to find your pulse and count the beats to determine your heart rate. But when you use a stationary bike, the machine might be equipped with a heart-rate sensor.
How it works. In a stress test, you walk on a treadmill that makes your heart work progressively harder. An electrocardiogram (ECG) monitors your heart's electrical rhythms. The doctor also measures your blood pressure and monitors whether you have symptoms like chest discomfort or fatigue.