"Cardio routines" refers to exercises or activities that get your heart pumping and improve your cardiovascular health. These routines typically include exercises like running, swimming, biking, or other forms of aerobic exercise. Full definition
Now you're probably thinking that since I'm against typical boring cardio routines, then that must simply mean I'm a proponent of interval training. (truthaboutabs.com)
For cardio routines, increasing time in motion means you'll increase intensity. (blog.fitplanapp.com)
As I mentioned before bodyweight exercises can be used to build muscle and burn fat or replace your typical cardio routine. (fitnessdoctrine.com)