Final answer:
Chronic aerobic training can result in a lower resting heart rate, a lower heart rate during exercise, and a faster heart rate recovery after exercise.
Step-by-step explanation:
Chronic aerobic training can lead to several changes in heart rate (HR). While at rest, aerobic training can lower the resting heart rate due to increased efficiency of the cardiovascular system. During exercise, trained individuals will have a decrease in HR for a given exercise intensity compared to untrained individuals. This is because chronic aerobic training improves the ability of the heart to pump blood, leading to higher stroke volume and lower HR. Furthermore, chronic aerobic training can also lead to an increase in HR recovery. After exercise, the HR of trained individuals will return to normal levels faster compared to untrained individuals. This indicates a more efficient cardiovascular system and greater cardiovascular fitness. In summary, chronic aerobic training can result in a lower resting HR, a lower HR during exercise, and a faster HR recovery after exercise.