Hello blades, I've always been big into lifting and getting mass on my body. I've rarely ever been into much cardio... But I do cardio probably 3-4 times a week. The problem is I just love doing body weight exercises in various circuit trainings a lot. I could/sometimes do, do them 5-6 times a week. Recently i've seen this can be bad for your overall training. What do you think? Is doing upper/lower body (body weight) circuit training 5 times a week bad for my training? Should I just suck it up and do more cardio? Also, how many times should I work my core a week? Its something I could do everyday and I enjoy doing it but if I need to rest for better results I will. Thanks!