Endurance training means doing activities that get your heart and lungs working and help your body stay active for a long time. Just like how you practice to ride a bike or play a sport better, doing endurance training helps your body get better at staying active for a longer time. You can do endurance training by running, biking, swimming, or doing any activity that gets you moving and keeps you moving for a while. The more you do it, the stronger and better your body gets at it!