Final answer:
When our heart rate increases during exercise, it is called aerobic exercise, which engages large muscle groups and increases heart rate and breathing rate.
Step-by-step explanation:
When we exercise and our heart rate increases, this is called aerobic exercise. Aerobic exercise is a type of exercise that engages large muscle groups and increases the heart rate and breathing rate. Examples of aerobic exercises include running, swimming, cycling, and dancing.
Learn more about types of exercise