Final answer:
Visiting professional athletes have a difficult time performing intense physical activity in Denver due to the high altitude. The thinner air at higher altitudes has less oxygen, making it harder for athletes to breathe and causing fatigue more quickly. It takes time for athletes to acclimate to the altitude and adjust to the lower oxygen levels.
Step-by-step explanation:
Visiting professional athletes have a difficult time performing intense physical activity in Denver due to the city's high altitude. Denver is known as the Mile High City because it sits at an elevation of about 5,280 feet above sea level. At higher altitudes, the air is thinner and has less oxygen, which can make it harder for athletes to breathe and can cause fatigue more quickly.
This is because the body needs more oxygen to fuel intense physical activity, and at higher altitudes, there is less oxygen available per breath. This can lead to symptoms such as shortness of breath, dizziness, and decreased endurance. It can take time for athletes to acclimate to the altitude and for their bodies to adjust to the lower levels of oxygen.
Examples of professional sports teams that have difficulty performing in Denver include the NFL's Denver Broncos and the NBA's Denver Nuggets. These teams have a home field advantage because they are acclimated to the altitude, while visiting teams may struggle due to the physiological effects of the high altitude.