In Science, we have been learning how to keep healthy. This week we were looking at our hearts. We learned how to take our pulse, how exercise can keep our heart healthy, and how our pulse rate increases after different exercises. We did an experiment where we took our resting pulse rate, then in groups we did 3 minutes of different exercises. After this, we took our pulse rate again to see which group's exercise increased the heart rate the most. We found that exercises such as running and star jumps increased our heart rates more than marching on the spot or sit ups.