Patrick Sayers 12/3/12 Period 9 Conclusion and Discussion Part 1 1) As exercise occurs, what happens to pulse rate? Exercise causes your heart to work harder to deliver more blood to energy-hungry muscles, which increases your heart rate 2) Exercise causes your heart to work harder to deliver more blood to energy-hungry muscles, which increases your heart rate. When you feel someone's pulse or your own, you are feeling the pressure pulses created by the beating of the heart. The increased pulse rate increased heart rate. Blood flows more vigorously through the body which leads to increase in blood pressure.