今日任务分配：在今天的课程中，你要用科学方法计算运动对心率的影响。

Discover how exercise, asthma, and smoking influence the respiratory system, including the benefits of physical activity and the impact of harmful habits like smoking. The video also guides you through a practical investigation measuring breathing and heart rates before and after exercise, helping you understand how the body responds to physical activity and the significance of fitness levels in recovery. Dive into this engaging exploration of respiratory health and data collection to enhance your understanding of human physiology.