How can regular exercise influence upper respiratory health?

• A. It increases the likelihood of respiratory infections
• B. It can boost the immune system, improving resistance to infections
• C. It doesn’t have any noticeable effect on respiratory health
• D. It weakens lung capacity

Answer: (B)

Regular, moderate exercise helps prime the immune system and can lower the frequency and severity of upper respiratory infections. Movement boosts the circulation of immune cells throughout the body, so surveillance against pathogens improves and invaders in the airways are detected and fought more effectively. It also supports mucosal immunity in the respiratory tract, with factors like increased salivary IgA contributing to a stronger barrier against respiratory pathogens. Additionally, better cardiovascular and pulmonary fitness helps the airways clear pathogens more efficiently and supports quicker recovery if an infection occurs. While regular activity is beneficial, very intense or prolonged exercise without adequate rest can temporarily dampen immunity, which is why moderation and recovery are key. Overall, regular exercise strengthens defenses and improves upper respiratory health.