There are a few things you can do to increase your lung capacity for hiking. First, make sure you’re in good cardiovascular shape by exercising regularly. This will help your lungs work more efficiently. Secondly, try breathing exercises such as pursed-lip breathing and diaphragmatic breathing. These exercises can help improve your lung function. Lastly, try to hike in high altitudes gradually to acclimatize your lungs to the thinner air. By following these tips, you should be able to increase your lung capacity and enjoy hikes more!