I'm not a competitive bodybuilder but i do train like one. In the past i have really focused on lifting as heavy as i can safely muster and eat clean all the time (no bulking and cutting). Anyways, I've never really done cardio, mainly because I have always heard that it saps strength and if on a low calorie diet, eats muscle. I know these claims are a little exaggerated seeing as every bodybuilder on the planet does it. I've also started doing some mobility work on my off days, mainly foam rolling and dynamic stretches. Unfortunately this hasn't left me with any free time (my schedule was already too stressful).
... so my question is, would it be a decent idea to do Mobility exercises (lateral lunges, spider man lunges, dive bombers, windmills etc.) as a circuit for cardio? It seems like it would help with active recovery and burn some extra calories on off days but I personally don't know anyone or have heard of any bodybuilders who does this. Any opinions?