It is recommended that you exercise within 55 to 85 percent of your maximum heart rate<span> for at least 20 to 30 minutes to get the best results from aerobic exercise</span>
Answer:
smooth lining of tunica inetrna
Your udgment is the answer
Endurance because he keeps moving at a pace he set for himself and even though he must be tired from all the stopping and running he still works hard and doesn't stop
