Understanding Oxygen Saturation: How to Use A Pulse Oximeter and What You Need to Know for Lung Health and Fitness

In recent years, especially during the COVID-19 pandemic, pulse oximeters have become a common tool in many households. These small, fingertip devices measure your blood oxygen saturation (SpO₂) and heart rate, providing a quick glimpse into how well your lungs and heart are delivering oxygen to your body.  Whether you have asthma, COPD, emphysema, or are simply interested in monitoring your fitness, understanding how to use a pulse oximeter during exercise can help you exercise safely, recognize warning signs early, and optimize your workouts.