Okay, so cardio, usually things that require your legs or something that requires you to pump a lot of blood through your heart. So like, I'd consider burpees like cardio. But running, bicycling, skateboarding, fucking swimming is a form of cardio. If you really want to get into cardio, I'd start off with like a jog. You don't need to be fucking full throttling it. I mean, it's just about maintaining it like any other exercise, but it's really just about moving your legs. It's not that complicated.